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Segment Reporting, Income Statements (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
reporting_segments
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Information [Line Items]                      
Number of reportable segments                 9us-gaap_NumberOfReportableSegments    
Revenues:                      
Net sales $ 3,982,000,000us-gaap_SalesRevenueGoodsNet $ 4,557,000,000us-gaap_SalesRevenueGoodsNet $ 4,867,000,000us-gaap_SalesRevenueGoodsNet $ 4,666,000,000us-gaap_SalesRevenueGoodsNet $ 4,533,000,000us-gaap_SalesRevenueGoodsNet $ 4,181,000,000us-gaap_SalesRevenueGoodsNet $ 4,497,000,000us-gaap_SalesRevenueGoodsNet $ 4,574,000,000us-gaap_SalesRevenueGoodsNet $ 18,072,000,000us-gaap_SalesRevenueGoodsNet $ 17,785,000,000us-gaap_SalesRevenueGoodsNet $ 14,574,000,000us-gaap_SalesRevenueGoodsNet
Other revenues from operations                 1,250,000,000us-gaap_OtherSalesRevenueNet 988,000,000us-gaap_OtherSalesRevenueNet 951,000,000us-gaap_OtherSalesRevenueNet
Net (loss) gain from investment activities                 (564,000,000)us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments 1,694,000,000us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments 343,000,000us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
Interest and dividend income                 217,000,000us-gaap_InterestAndDividendIncomeOperating 194,000,000us-gaap_InterestAndDividendIncomeOperating 103,000,000us-gaap_InterestAndDividendIncomeOperating
Other (loss) income, net                 182,000,000us-gaap_OtherNonoperatingIncomeExpense 21,000,000us-gaap_OtherNonoperatingIncomeExpense (175,000,000)us-gaap_OtherNonoperatingIncomeExpense
Total Revenues 3,366,000,000us-gaap_Revenues 4,422,000,000us-gaap_Revenues 6,379,000,000us-gaap_Revenues 4,990,000,000us-gaap_Revenues 4,872,000,000us-gaap_Revenues 5,771,000,000us-gaap_Revenues 4,670,000,000us-gaap_Revenues 5,369,000,000us-gaap_Revenues 19,157,000,000us-gaap_Revenues 20,682,000,000us-gaap_Revenues 15,796,000,000us-gaap_Revenues
Expenses:                      
Cost of goods sold                 16,485,000,000us-gaap_CostOfGoodsSold 15,809,000,000us-gaap_CostOfGoodsSold 12,606,000,000us-gaap_CostOfGoodsSold
Other expenses from operations                 613,000,000us-gaap_OtherCostAndExpenseOperating 504,000,000us-gaap_OtherCostAndExpenseOperating 502,000,000us-gaap_OtherCostAndExpenseOperating
Selling, general and administrative                 1,625,000,000us-gaap_SellingGeneralAndAdministrativeExpense 1,417,000,000us-gaap_SellingGeneralAndAdministrativeExpense 1,275,000,000us-gaap_SellingGeneralAndAdministrativeExpense
Restructuring                 84,000,000us-gaap_RestructuringCharges 50,000,000us-gaap_RestructuringCharges 31,000,000us-gaap_RestructuringCharges
Impairment                 135,000,000us-gaap_AssetImpairmentCharges 16,000,000us-gaap_AssetImpairmentCharges 129,000,000us-gaap_AssetImpairmentCharges
Interest expense                 847,000,000us-gaap_InterestExpense 560,000,000us-gaap_InterestExpense 572,000,000us-gaap_InterestExpense
Total Expenses                 19,789,000,000iep_TotalExpenses 18,356,000,000iep_TotalExpenses 15,115,000,000iep_TotalExpenses
Income before income tax benefit (expense)                 (632,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 2,326,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 681,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income tax benefit                 103,000,000us-gaap_IncomeTaxExpenseBenefit 118,000,000us-gaap_IncomeTaxExpenseBenefit 81,000,000us-gaap_IncomeTaxExpenseBenefit
Net (loss) income (1,102,000,000)us-gaap_ProfitLoss (627,000,000)us-gaap_ProfitLoss 1,123,000,000us-gaap_ProfitLoss 77,000,000us-gaap_ProfitLoss 405,000,000us-gaap_ProfitLoss 1,236,000,000us-gaap_ProfitLoss 93,000,000us-gaap_ProfitLoss 710,000,000us-gaap_ProfitLoss (529,000,000)us-gaap_ProfitLoss 2,444,000,000us-gaap_ProfitLoss 762,000,000us-gaap_ProfitLoss
Less: net loss (income) attributable to non-controlling interests                 156,000,000us-gaap_IncomeLossAttributableToNoncontrollingInterest (1,419,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest (366,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
Net (loss) income attributable to Icahn Enterprises (478,000,000)us-gaap_NetIncomeLoss (355,000,000)us-gaap_NetIncomeLoss 489,000,000us-gaap_NetIncomeLoss (29,000,000)us-gaap_NetIncomeLoss 222,000,000us-gaap_NetIncomeLoss 472,000,000us-gaap_NetIncomeLoss 54,000,000us-gaap_NetIncomeLoss 277,000,000us-gaap_NetIncomeLoss (373,000,000)us-gaap_NetIncomeLoss 1,025,000,000us-gaap_NetIncomeLoss 396,000,000us-gaap_NetIncomeLoss
Supplemental information:                      
Capital expenditures                 1,411,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment 1,161,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment 936,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Depreciation and amortization                 787,000,000us-gaap_DepreciationDepletionAndAmortization [1] 708,000,000us-gaap_DepreciationDepletionAndAmortization [1] 607,000,000us-gaap_DepreciationDepletionAndAmortization [1]
Amortization included in interest expense                 22,000,000us-gaap_AmortizationOfFinancingCostsAndDiscounts 34,000,000us-gaap_AmortizationOfFinancingCostsAndDiscounts 28,000,000us-gaap_AmortizationOfFinancingCostsAndDiscounts
Investment Segment [Member]                      
Revenues:                      
Net sales                 0us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Other revenues from operations                 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Net (loss) gain from investment activities                 (421,000,000)us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 1,850,000,000us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 314,000,000us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Interest and dividend income                 202,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 178,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 85,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Other (loss) income, net                 1,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 3,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 (1,000,000)us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Total Revenues                 (218,000,000)us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 2,031,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 398,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Expenses:                      
Cost of goods sold                 0us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Other expenses from operations                 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Selling, general and administrative                 167,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 119,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 24,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Restructuring                 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Impairment                 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Interest expense                 299,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 10,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 2,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Total Expenses                 466,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 129,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 26,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Income before income tax benefit (expense)                 (684,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 1,902,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 372,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Income tax benefit                 0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Net (loss) income                 (684,000,000)us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 1,902,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 372,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Less: net loss (income) attributable to non-controlling interests                 379,000,000us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 (1,090,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 (215,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Net (loss) income attributable to Icahn Enterprises                 (305,000,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 812,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 157,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Supplemental information:                      
Capital expenditures                 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Depreciation and amortization                 0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 [1] 0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 [1] 0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 [1]
Automotive Segment [Member]                      
Revenues:                      
Net sales                 7,317,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 6,905,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 6,664,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Other revenues from operations                 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Net (loss) gain from investment activities                 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Interest and dividend income                 5,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 3,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 5,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Other (loss) income, net                 2,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 (32,000,000)us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 8,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Total Revenues                 7,324,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 6,876,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 6,677,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Expenses:                      
Cost of goods sold                 6,260,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 5,885,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 5,753,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Other expenses from operations                 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Selling, general and administrative                 825,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 749,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 710,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Restructuring                 86,000,000us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 40,000,000us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 26,000,000us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Impairment                 24,000,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 8,000,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 98,000,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Interest expense                 128,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 111,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 141,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Total Expenses                 7,323,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 6,793,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 6,728,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Income before income tax benefit (expense)                 1,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 83,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 (51,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Income tax benefit                 91,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 180,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 29,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Net (loss) income                 (90,000,000)us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 263,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 (22,000,000)us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Less: net loss (income) attributable to non-controlling interests                 3,000,000us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 (13,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 (2,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Net (loss) income attributable to Icahn Enterprises                 (87,000,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 250,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 (24,000,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Supplemental information:                      
Capital expenditures                 418,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 380,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 387,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Depreciation and amortization                 335,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 [1] 296,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 [1] 289,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 [1]
Energy Segment [Member]                      
Revenues:                      
Net sales                 9,109,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 8,986,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 5,703,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Other revenues from operations                 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Net (loss) gain from investment activities                 (6,000,000)us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Interest and dividend income                 3,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 1,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 1,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Other (loss) income, net                 186,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 76,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 (185,000,000)us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Total Revenues                 9,292,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 9,063,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 5,519,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Expenses:                      
Cost of goods sold                 8,774,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 8,204,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 4,848,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Other expenses from operations                 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Selling, general and administrative                 136,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 137,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 112,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Restructuring                 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Impairment                 103,000,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Interest expense                 38,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 48,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 39,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Total Expenses                 9,051,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 8,389,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 4,999,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Income before income tax benefit (expense)                 241,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 674,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 520,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Income tax benefit                 73,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 195,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 182,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Net (loss) income                 168,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 479,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 338,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Less: net loss (income) attributable to non-controlling interests                 (73,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 (190,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 (75,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Net (loss) income attributable to Icahn Enterprises                 95,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 289,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 263,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Supplemental information:                      
Capital expenditures                 218,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 256,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 138,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [2]
Depreciation and amortization                 219,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [1] 208,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [1] 128,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 [1],[2]
Gaming Segment [Member]                      
Revenues:                      
Net sales                 0us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 0us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 0us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Other revenues from operations                 759,000,000us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 575,000,000us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 613,000,000us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Net (loss) gain from investment activities                 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Interest and dividend income                 2,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 1,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 1,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Other (loss) income, net                 88,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 (5,000,000)us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 (3,000,000)us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Total Revenues                 849,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 571,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 611,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Expenses:                      
Cost of goods sold                 0us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 0us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 0us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Other expenses from operations                 387,000,000us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 294,000,000us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 312,000,000us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Selling, general and administrative                 327,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 238,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 250,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Restructuring                 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Impairment                 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 3,000,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 2,000,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Interest expense                 13,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 14,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 13,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Total Expenses                 727,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 549,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 577,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Income before income tax benefit (expense)                 122,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 22,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 34,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Income tax benefit                 (147,000,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 (3,000,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 (4,000,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Net (loss) income                 269,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 19,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 30,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Less: net loss (income) attributable to non-controlling interests                 (84,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 (6,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 (9,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Net (loss) income attributable to Icahn Enterprises                 185,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 13,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 21,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Supplemental information:                      
Capital expenditures                 81,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 57,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 44,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Depreciation and amortization                 50,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 [1] 34,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 [1] 32,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 [1]
Railcar Segment [Member]                      
Revenues:                      
Net sales                 379,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 408,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 530,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Other revenues from operations                 411,000,000us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 331,000,000us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 256,000,000us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Net (loss) gain from investment activities                 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 2,000,000us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 2,000,000us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Interest and dividend income                 3,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 9,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 11,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Other (loss) income, net                 16,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 (6,000,000)us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 0us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Total Revenues                 809,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 744,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 799,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Expenses:                      
Cost of goods sold                 288,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 326,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 419,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Other expenses from operations                 175,000,000us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 160,000,000us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 141,000,000us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Selling, general and administrative                 42,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 39,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 37,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Restructuring                 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Impairment                 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Interest expense                 60,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 49,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 68,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Total Expenses                 565,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 574,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 665,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Income before income tax benefit (expense)                 244,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 170,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 134,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Income tax benefit                 56,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 (31,000,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 (42,000,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Net (loss) income                 188,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 139,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 92,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Less: net loss (income) attributable to non-controlling interests                 (66,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 (109,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 (63,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Net (loss) income attributable to Icahn Enterprises                 122,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 30,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 29,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Supplemental information:                      
Capital expenditures                 626,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 424,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 302,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Depreciation and amortization                 106,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 [1] 92,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 [1] 83,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 [1]
Food Packaging Segment [Member]                      
Revenues:                      
Net sales                 365,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 371,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 343,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Other revenues from operations                 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Net (loss) gain from investment activities                 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Interest and dividend income                 0us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 0us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 0us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Other (loss) income, net                 (19,000,000)us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 (25,000,000)us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 (2,000,000)us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Total Revenues                 346,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 346,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 341,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Expenses:                      
Cost of goods sold                 275,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 285,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 263,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Other expenses from operations                 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Selling, general and administrative                 45,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 47,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 45,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Restructuring                 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 1,000,000us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Impairment                 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Interest expense                 14,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 22,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 21,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Total Expenses                 334,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 354,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 330,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Income before income tax benefit (expense)                 12,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 (8,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 11,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Income tax benefit                 3,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 51,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 (5,000,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Net (loss) income                 9,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 43,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 6,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Less: net loss (income) attributable to non-controlling interests                 (3,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 (11,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 (2,000,000)us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Net (loss) income attributable to Icahn Enterprises                 6,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 32,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 4,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Supplemental information:                      
Capital expenditures                 23,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 20,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 39,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Depreciation and amortization                 22,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 [1] 21,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 [1] 18,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 [1]
Metals Segment [Member]                      
Revenues:                      
Net sales                 711,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 929,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 1,102,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Other revenues from operations                 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Net (loss) gain from investment activities                 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Interest and dividend income                 0us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Other (loss) income, net                 0us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 1,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Total Revenues                 711,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 929,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 1,103,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Expenses:                      
Cost of goods sold                 728,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 948,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 1,116,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Other expenses from operations                 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Selling, general and administrative                 23,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 27,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 28,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Restructuring                 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Impairment                 3,000,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 2,000,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 18,000,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Interest expense                 0us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Total Expenses                 754,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 977,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 1,162,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Income before income tax benefit (expense)                 (43,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 (48,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 (59,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Income tax benefit                 (18,000,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 20,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 1,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Net (loss) income                 (25,000,000)us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 (28,000,000)us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 (58,000,000)us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Less: net loss (income) attributable to non-controlling interests                 0us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 0us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Net (loss) income attributable to Icahn Enterprises                 (25,000,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 (28,000,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 (58,000,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Supplemental information:                      
Capital expenditures                 41,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 15,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 24,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Depreciation and amortization                 26,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 [1] 26,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 [1] 26,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 [1]
Real Estate Segment [Member]                      
Revenues:                      
Net sales                 15,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 2,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 4,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Other revenues from operations                 80,000,000us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 82,000,000us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 82,000,000us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Net (loss) gain from investment activities                 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Interest and dividend income                 0us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 0us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 0us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Other (loss) income, net                 6,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 1,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 2,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Total Revenues                 101,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 85,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 88,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Expenses:                      
Cost of goods sold                 8,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 0us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 1,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Other expenses from operations                 51,000,000us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 50,000,000us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 49,000,000us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Selling, general and administrative                 12,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 12,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 14,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Restructuring                 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Impairment                 5,000,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 2,000,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Interest expense                 3,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 4,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 5,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Total Expenses                 79,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 68,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 69,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Income before income tax benefit (expense)                 22,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 17,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 19,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Income tax benefit                 0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Net (loss) income                 22,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 17,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 19,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Less: net loss (income) attributable to non-controlling interests                 0us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 0us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 0us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Net (loss) income attributable to Icahn Enterprises                 22,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 17,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 19,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Supplemental information:                      
Capital expenditures                 1,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 2,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 2,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Depreciation and amortization                 22,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 [1] 23,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 [1] 23,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 [1]
Home Fashion Segment [Member]                      
Revenues:                      
Net sales                 176,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 184,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 228,000,000us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Other revenues from operations                 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Net (loss) gain from investment activities                 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Interest and dividend income                 0us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Other (loss) income, net                 5,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 3,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 3,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Total Revenues                 181,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 187,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 231,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Expenses:                      
Cost of goods sold                 152,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 161,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 206,000,000us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Other expenses from operations                 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Selling, general and administrative                 29,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 31,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 37,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Restructuring                 (2,000,000)us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 10,000,000us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 4,000,000us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Impairment                 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 1,000,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 11,000,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Interest expense                 0us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Total Expenses                 179,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 203,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 258,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Income before income tax benefit (expense)                 2,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 (16,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 (27,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Income tax benefit                 0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Net (loss) income                 2,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 (16,000,000)us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 (27,000,000)us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Less: net loss (income) attributable to non-controlling interests                 0us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Net (loss) income attributable to Icahn Enterprises                 2,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 (16,000,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 (27,000,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Supplemental information:                      
Capital expenditures                 3,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 7,000,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Depreciation and amortization                 7,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 [1] 8,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 [1] 8,000,000us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 [1]
Holding Company [Member]                      
Revenues:                      
Net sales                 0us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_SalesRevenueGoodsNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Other revenues from operations                 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_OtherSalesRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Net (loss) gain from investment activities                 (137,000,000)us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 (158,000,000)us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 27,000,000us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Interest and dividend income                 2,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 2,000,000us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Other (loss) income, net                 (103,000,000)us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 6,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 2,000,000us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Total Revenues                 (238,000,000)us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 (150,000,000)us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 29,000,000us-gaap_Revenues
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Expenses:                      
Cost of goods sold                 0us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_CostOfGoodsSold
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Other expenses from operations                 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_OtherCostAndExpenseOperating
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Selling, general and administrative                 19,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 18,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 18,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Restructuring                 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Impairment                 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Interest expense                 292,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 302,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 283,000,000us-gaap_InterestExpense
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Total Expenses                 311,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 320,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 301,000,000iep_TotalExpenses
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Income before income tax benefit (expense)                 (549,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 (470,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 (272,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Income tax benefit                 (161,000,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 96,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 284,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Net (loss) income                 (388,000,000)us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 (374,000,000)us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 12,000,000us-gaap_ProfitLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Less: net loss (income) attributable to non-controlling interests                 0us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_IncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Net (loss) income attributable to Icahn Enterprises                 (388,000,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 (374,000,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 12,000,000us-gaap_NetIncomeLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Supplemental information:                      
Capital expenditures                 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Depreciation and amortization                 0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 [1] 0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 [1] 0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 [1]
Icahn Enterprises Holdings [Member]                      
Revenues:                      
Net sales                 18,072,000,000us-gaap_SalesRevenueGoodsNet
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 17,785,000,000us-gaap_SalesRevenueGoodsNet
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 14,574,000,000us-gaap_SalesRevenueGoodsNet
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Other revenues from operations                 1,250,000,000us-gaap_OtherSalesRevenueNet
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 988,000,000us-gaap_OtherSalesRevenueNet
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 951,000,000us-gaap_OtherSalesRevenueNet
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Net (loss) gain from investment activities                 (564,000,000)us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 1,694,000,000us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 343,000,000us-gaap_GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Interest and dividend income                 217,000,000us-gaap_InterestAndDividendIncomeOperating
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 194,000,000us-gaap_InterestAndDividendIncomeOperating
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 103,000,000us-gaap_InterestAndDividendIncomeOperating
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Other (loss) income, net                 182,000,000us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 21,000,000us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 (175,000,000)us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Total Revenues                 19,157,000,000us-gaap_Revenues
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 20,682,000,000us-gaap_Revenues
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 15,796,000,000us-gaap_Revenues
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Expenses:                      
Cost of goods sold                 16,485,000,000us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 15,809,000,000us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 12,606,000,000us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Other expenses from operations                 613,000,000us-gaap_OtherCostAndExpenseOperating
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 504,000,000us-gaap_OtherCostAndExpenseOperating
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 502,000,000us-gaap_OtherCostAndExpenseOperating
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Selling, general and administrative                 1,625,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 1,417,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 1,275,000,000us-gaap_SellingGeneralAndAdministrativeExpense
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Restructuring                 84,000,000us-gaap_RestructuringCharges
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 50,000,000us-gaap_RestructuringCharges
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 31,000,000us-gaap_RestructuringCharges
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Impairment                 135,000,000us-gaap_AssetImpairmentCharges
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 16,000,000us-gaap_AssetImpairmentCharges
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 129,000,000us-gaap_AssetImpairmentCharges
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Interest expense                 846,000,000us-gaap_InterestExpense
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 560,000,000us-gaap_InterestExpense
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 571,000,000us-gaap_InterestExpense
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Total Expenses                 19,788,000,000iep_TotalExpenses
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 18,356,000,000iep_TotalExpenses
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 15,114,000,000iep_TotalExpenses
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Income before income tax benefit (expense)                 (631,000,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 2,326,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 682,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Income tax benefit                 103,000,000us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 118,000,000us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 81,000,000us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Net (loss) income                 (528,000,000)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 2,444,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 763,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Net (loss) income attributable to Icahn Enterprises                 (372,000,000)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 1,025,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 397,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Supplemental information:                      
Amortization included in interest expense                 21,000,000us-gaap_AmortizationOfFinancingCostsAndDiscounts
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 34,000,000us-gaap_AmortizationOfFinancingCostsAndDiscounts
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember		 27,000,000us-gaap_AmortizationOfFinancingCostsAndDiscounts
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
Icahn Enterprises Holdings [Member] | Investment Segment [Member]                      
Expenses:                      
Net (loss) income                 (684,000,000)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 1,902,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 372,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Net (loss) income attributable to Icahn Enterprises                 (305,000,000)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 812,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember		 157,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_InvestmentSegmentMember
Icahn Enterprises Holdings [Member] | Automotive Segment [Member]                      
Expenses:                      
Net (loss) income                 (90,000,000)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 263,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 (22,000,000)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Net (loss) income attributable to Icahn Enterprises                 (87,000,000)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 250,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember		 (24,000,000)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_AutomotiveSegmentMember
Icahn Enterprises Holdings [Member] | Energy Segment [Member]                      
Expenses:                      
Net (loss) income                 168,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 479,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 338,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember
Net (loss) income attributable to Icahn Enterprises                 95,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 289,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember		 263,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_EnergySegmentMember
Icahn Enterprises Holdings [Member] | Gaming Segment [Member]                      
Expenses:                      
Net (loss) income                 269,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 19,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 30,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Net (loss) income attributable to Icahn Enterprises                 185,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 13,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember		 21,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_GamingSegmentMember
Icahn Enterprises Holdings [Member] | Railcar Segment [Member]                      
Expenses:                      
Net (loss) income                 188,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 139,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 92,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Net (loss) income attributable to Icahn Enterprises                 122,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 30,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember		 29,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
Icahn Enterprises Holdings [Member] | Food Packaging Segment [Member]                      
Expenses:                      
Net (loss) income                 9,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 43,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 6,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Net (loss) income attributable to Icahn Enterprises                 6,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 32,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember		 4,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_FoodPackagingSegmentMember
Icahn Enterprises Holdings [Member] | Metals Segment [Member]                      
Expenses:                      
Net (loss) income                 (25,000,000)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 (28,000,000)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 (58,000,000)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Net (loss) income attributable to Icahn Enterprises                 (25,000,000)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 (28,000,000)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember		 (58,000,000)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_MetalsSegmentMember
Icahn Enterprises Holdings [Member] | Real Estate Segment [Member]                      
Expenses:                      
Net (loss) income                 22,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 17,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 19,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Net (loss) income attributable to Icahn Enterprises                 22,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 17,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember		 19,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
Icahn Enterprises Holdings [Member] | Home Fashion Segment [Member]                      
Expenses:                      
Net (loss) income                 2,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 (16,000,000)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 (27,000,000)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Net (loss) income attributable to Icahn Enterprises                 2,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 (16,000,000)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember		 (27,000,000)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HomeFashionSegmentMember
Icahn Enterprises Holdings [Member] | Holding Company [Member]                      
Expenses:                      
Interest expense                 291,000,000us-gaap_InterestExpense
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 302,000,000us-gaap_InterestExpense
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 282,000,000us-gaap_InterestExpense
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Net (loss) income                 (387,000,000)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 (374,000,000)us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 13,000,000us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
Net (loss) income attributable to Icahn Enterprises                 $ (387,000,000)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 $ (374,000,000)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember		 $ 13,000,000us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= iep_IcahnEnterprisesHoldingsMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_HoldingCompanyMember
[1] Excludes amounts related to the amortization of debt discounts and premiums included in interest expense in the amounts of $22 million, $34 million and $28 million for the years ended December 31, 2014, 2013 and 2012, respectively.
[2] We consolidated CVR effective May 4, 2012.