Income Statement [Abstract] Statement [Table] Statement [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Icahn Enterprises Holdings [Member] Icahn Enterprises Holdings [Member] Icahn Enterprises Holdings [Member] Statement [Line Items] Statement [Line Items] Revenues: Revenues [Abstract] Net sales Sales Revenue, Goods, Net Other revenues from operations Other Revenue, Net Net gain from investment activities Gain (Loss) on Investments, Excluding Other than Temporary Impairments Interest and dividend income Interest and Dividend Income, Operating Other income (loss), net Other Nonoperating Income (Expense) Total Revenues Revenues Expenses: Costs and Expenses [Abstract] Cost of goods sold Cost of Goods Sold Other expenses from operations Other Cost and Expense, Operating Selling, general and administrative Selling, General and Administrative Expense Restructuring Restructuring Charges Impairment Asset Impairment Charges Interest expense Interest Expense Total Expenses Total Expenses Total of all operating and non-operating costs and expenses. Income before income tax expense Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Less: net income attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to Icahn Enterprises Net Income (Loss) Attributable to Parent Net income attributable to Icahn Enterprises allocable to: Net Income (Loss) Attributable to Parent [Abstract] Limited partners Net Income (Loss) Allocated to Limited Partners General partner Net Income (Loss) Allocated to General Partners Net income attributable to Icahn Enterprises Basic and diluted income per LP unit Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic, Net of Tax [Abstract] Basic and diluted income per LP unit Earnings Per Share, Basic and Diluted Basic and diluted weighted average LP units outstanding Weighted Average Number of Shares Outstanding, Basic and Diluted Cash distributions declared per LP unit Distributions Per Limited Partnership Unit Outstanding, Basic Debt Disclosure [Abstract] Debt Debt Disclosure [Text Block] Financial Instruments [Abstract] Financial Instruments [Abstract] Derivative [Table] Derivative [Table] Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] Energy Segment [Member] Energy Segment [Member] Energy Segment [Member] Automotive Segment [Member] Automotive Segment [Member] Automotive Segment [Member] Reporting unit [Axis] Reporting unit [Axis] Reporting unit [Axis] Production Type [Domain] Production Type [Domain] Motorparts [Member] Motorparts [Member] Motorparts [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales Revenue, Goods, Net [Member] Sales Revenue, Goods, Net [Member] Accounts Receivable [Member] Accounts Receivable [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk [Member] Customer Concentration Risk [Member] Federal-Mogul [Member] Federal-Mogul [Member] Federal-Mogul [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash Flow Hedging [Member] Cash Flow Hedging [Member] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Primary underlying risk: Derivative Contract [Domain] Interest rate swap contracts Interest Rate Swap [Member] Commodity contracts Commodity Contract [Member] Derivative [Line Items] Derivative [Line Items] Notional value of interest rate swap agreements Derivative, Notional Amount Unrealized net gains (losses) on price hedge contracts Accumulated other comprehensive income loss commodity price hedges. Accumulated other comprehensive income loss commodity price hedges. Number of customers accounting for more than 6% of direct sales Concentration Risk, Number of Customers Concentration Risk, Number of Customers Concentration of risk threshold, percentage of direct sales Concentration Risk, Threshold Concentration Risk, Threshold Concentration threshhold, balance sheet Concentration threshhold, balance sheet Concentration threshhold, balance sheet Segment Reporting [Abstract] Segment Reporting Segment Reporting Disclosure [Text Block] Other (Loss) Income, Net [Abstract] Other (Loss) Income, Net [Abstract] Other (Loss) Income, Net Other Income and Other Expense Disclosure [Text Block] Automotive Segment [Abstract] Automotive Segment [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] IEH Auto [Member] IEH Auto [Member] IEH Auto [Member] TRW [Member] TRW [Member] TRW [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Gross payments to acquire business Payments to Acquire Businesses, Gross Consideration payable upon conditions met with respect to business combination Business Combination, Contingent Consideration, Liability business combinations, recognized identifiable assets, net tangible assets business combinations, recognized identifiable assets, net tangible assets business combinations, recognized identifiable assets, net tangible assets Business combination, goodwill allocation Goodwill, Acquired During Period business combinations, recognized identifiable assets, net intangible assets business combinations, recognized identifiable assets, net intangible assets business combinations, recognized identifiable assets, net intangible assets Business Combination, Bargain Purchase, Gain Recognized, Amount Business Combination, Bargain Purchase, Gain Recognized, Amount Proceeds from subsidiary rights offering Proceeds From Rights Offering Proceeds From Rights Offering Payments to subsidiary to acquire additional interest in subsidiary, rights offering Payments to Acquire Interest in Subsidiaries and Affiliates Percentage of equity ownership in subsidiary Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest Gross amount of transferred receivables under factoring arrangement Transferor's Interests in Transferred Financial Assets, Fair Value Gross amount of transferred receivables under factoring arrangements qualifying as sales Gross accounts receivable factored, qualifying as sales Gross accounts receivable under factoring facilities qualify as sales. Undrawn cash with respect to transferred receivables Undrawn cash with respect to transferred receivables Undrawn cash with respect to transferred receivables Proceeds from transferred receivables under factoring arrangements qualifying as sales Cash Flows Between Transferor and Transferee, Proceeds from New Transfers Expenses associated with transferred receivables under factoring arrangements Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale, Gain (Loss) on Sale Maximum exposure associated with transferred receivables under factoring arrangements Continuing Involvement with Transferred Financial Assets, Principal Amount Outstanding Number of Distribution Centers Number of Distribution Centers Number of Distribution Centers Number of Stores Number of Stores Number of independent wholesalers in network Number of independent wholesalers in network Number of independent wholesalers in network Statement of Comprehensive Income [Abstract] Partner Type [Axis] Partner Type [Axis] Partner Type of Partners' Capital Account, Name [Domain] Partner Type of Partners' Capital Account, Name [Domain] Limited partners Limited Partner [Member] General partner General Partner [Member] Net income Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Post-employment benefits Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Hedge instruments Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Translation adjustments and other Other Comprehensive Income - Translation Adjustments and Other Changes in Other Comprehensive Income Principally includes change in the balance sheet adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into functional currency of the reporting entity for the period being reported, net of tax. If an entity's functional currency is a foreign currency, translation adjustments result from the process of translating that entity's financial statements into the reporting currency. Includes gain (loss) on foreign currency forward exchange contracts. Includes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. Includes the gain (loss) on a derivative instrument or nonderivative financial instrument that may give rise to a foreign currency transaction gain (loss) and that have been designated and have qualified as hedging instruments for hedges of the foreign currency exposure of a net investment in a foreign operation. Also includes other changes in other comprehensive income not otherwise identified. Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: Comprehensive income attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income attributable to Icahn Enterprises Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income attributable to Icahn Enterprises allocable to: Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Goodwill Schedule of Goodwill [Table Text Block] Schedule of Definite-Lived and Infinite-Lived Intangible Assets Schedule of Finite-Lived and Infinite-Lived Intangible Assets [Table Text Block] Schedule of Finite-Lived and Infinite-Lived Intangible Assets, Excluding Goodwill [Table Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Variable Rate Option [Axis] Variable Rate Option [Axis] Variable Rate Option [Axis] Variable Rate Option [Domain] Variable Rate Option [Domain] Variable Rate Option [Domain] LIBOR [Member] LIBOR [Member] LIBOR [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Term Loan [Member] Term Loan [Member] Term Loan [Member] Component of Other Income (Loss), Net [Axis] Component of Other Income (Loss), Net [Axis] Component of Other Income (Loss), net [Axis] Component of Other Income (Loss), Net, Name [Domain] Component of Other Income (Loss), Net Name [Domain] Component of Other Income (Loss), Net Name [Domain] Loss on extinguishment of debt (Note 10) Loss on Debt Extinguishment [Member] Loss on Debt Extinguishment [Member] Railcar Segment [Member] Railcar Segment [Member] Railcar Segment [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Senior unsecured notes [Member] Senior Debt Obligations [Member] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] ARI Notes due 2020 [Member] ARI Notes due 2020 [Member] ARI Notes due 2020 [Member] NCF I Term Loan [Member] NCF I Term Loan [Member] NCF I Term Loan [Member] NCF II Term Loan [Member] NCF II Term Loan [Member] NCF II Term Loan [Member] RCF Term Loan [Member] RCF Term Loan [Member] RCF Term Loan [Member] Class A-1 Notes [Member] Class A-1 Notes [Member] Class 2012 A-1 Notes [Member] Class A-2 Notes [Member] Class A-2 Notes [Member] Class A-2 Notes [Member] ARI Refinanced Term Loan [Member] ARI Refinanced Term Loan [Member] ARI Refinanced Term Loan ARILL2TermLoan [Domain] ARILL2TermLoan [Domain] LL2TermLoan [Domain] ARI 2015 Notes [Domain] ARI 2015 Notes [Member] ARI 2015 Notes [Member] Lease Fleet Financings [Member] Lease Fleet Financings [Member] Lease Fleet Financings Citizen Bank Revolver [Member] Citizen Bank Revolver [Member] Citizen Bank Revolver [Member] Heartland Bank Term Loan [Member] [Member] Heartland Bank Term Loan [Member] [Member] Heartland Bank Term Loan [Member] [Member] Credit Agricole Term Loan [Member] Credit Agricole Term Loan [Member] Credit Agricole Term Loan [Member] Banc of America Leasing & Capital, LLC [Member] Banc of America Leasing & Capital, LLC [Member] Banc of America Leasing & Capital, LLC [Member] Talmer Bank [Member] Talmer Bank [Member] Talmer Bank [Member] Class 2014 A-1 Notes [Member] Class 2014 A-1 Notes [Member] Class 2014 A-1 Notes [Member] Class 2014 A-2 Notes [Member] Class 2014 A-2 Notes [Member] Class 2014 A-2 Notes [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Aggregate principal amount issued, long-term debt Debt Instrument, Face Amount Line of credit facility Line of Credit Facility, Maximum Borrowing Capacity Line of credit facility, outstanding borowings Long-term Line of Credit Debt Instrument, Basis Spread on Variable Rate Debt Instrument, Basis Spread on Variable Rate Interest reserve amount Interest reserve amount Interest reserve amount Pledged assets Pledged Assets, Other, Not Separately Reported on Statement of Financial Position Senior credit facility, maximum borrowing availability Line of Credit Facility, Current Borrowing Capacity Loss on extinguishment of debt Gains (Losses) on Extinguishment of Debt Long-term Debt Long-term Debt Proceeds from Issuance of Debt Proceeds from Issuance of Debt Additional borrowing availability Additional borrowing availability Additional borrowing availability Interest rate, long-term debt Debt Instrument, Interest Rate, Stated Percentage Use of portion of debt proceeds Use of portion of debt proceeds Use of portion of debt proceeds Debt Instrument, Interest Rate, Increase (Decrease) Debt Instrument, Interest Rate, Increase (Decrease) Future debt expected to be incurred by new capitalized entity Future debt expected to be incurred by new capitalized entity Future debt expected to be incurred by new capitalized entity Proceeds from Issuance of Long-term Debt Proceeds from Issuance of Long-term Debt Use of portion of debt proceeds to repay other debt Use of portion of debt proceeds to repay other debt Use of portion of debt proceeds to repay other debt Proceeds from issuance of Long-term debt after proceeds used to refinance prior debt Proceeds from issuance of Long-term debt after proceeds used to refinance prior debt Proceeds from issuance of Long-term debt after proceeds used to refinance prior debt Proceeds from Issuance of Private Placement Proceeds from Issuance of Private Placement Proceeds from (Repayments of) Debt Proceeds from (Repayments of) Debt Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Fair Value Disclosures [Text Block] Investments and Related Matters [Abstract] Investments and Related Matters [Abstract] Investment and Related Matter [Table] Investment and Related Matter [Table] Investment and Related Matter [Table] Other Segments [Member] Other Segments [Member] Other Segments [Member] Investment and Related Matters [Line Items] Investment and Related Matters [Line Items] Investment and Related Matters [Line Items] Investment Investment [Table Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Debt Facility [Member] Debt Facility [Member] Debt Facility [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Other income (loss), net [Member] Other Income (Loss) Not Specified [Member] Other Income (Loss) not otherwise specified in the disclosure [Member] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Swap [Member] Swap [Member] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Accrued expenses and other liabilities [Member] Accrued Expenses and Other Liabilities [Member] Accrued Expenses and Other Liabilities [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Realized gain (loss) on commodity derivatives Gain (Loss) on Sale of Commodity Contracts Barrels of crack spreads hedging margin on future gasoline and distillate production Derivative, Nonmonetary Notional Amount Derivative Asset, Fair Value, Amount Not Offset Against Collateral Derivative Asset, Fair Value, Amount Not Offset Against Collateral Balance of debt partially hedged Derivative, Amount of Hedged Item Lower fixed interest rate paid on interest rate swaps Derivative, Fixed Interest Rate Frequency of interest rate swap settlements Interest Rate Cash Flow Hedge Derivative, Settlement Frequency Interest Rate Cash Flow Hedge Derivative, Settlement Frequency Average fixed interest rate paid on interest rate swaps Derivative, Average Fixed Interest Rate Effective interest rate on debt hedged Debt Instrument, Interest Rate, Effective Percentage Realized loss on interest rate swaps reclassified from AOCI into interest expense Derivative, Gain (Loss) on Derivative, Net Notional Exposure of Derivatives, Short Position, less than three months Notional Exposure of Derivatives, Short Position, less than three months Notional Exposure of Derivatives, Short Position, less than three months Short Notional Exposure Notional Exposure of Derivatives, Short Position Notional Exposure of Derivatives, Short Position Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Schedule of Condensed Financial Statements [Table] Condensed Financial Statements [Table] Investment Segment [Member] Investment Segment [Member] Investment Segment [Member] Metals Segment [Member] Metals Segment [Member] Metals Segment [Member] Gaming Segment [Member] Gaming Segment [Member] Gaming Segment [Member] Mining Segment [Member] Mining Segment [Member] Mining Segment [Member] Food Packaging Segment [Member] Food Packaging Segment [Member] Food Packaging Segment [Member] Real Estate Segment [Member] Real Estate Segment [Member] Real Estate Segment [Member] Home Fashion Segment [Member] Home Fashion Segment [Member] Home Fashion Segment [Member] Holding Company [Member] Holding Company [Member] Holding Company [Member] Total assets Assets Number of reporting segments Number of Reportable Segments Net gain from investment activities Other (loss) income, net Total Revenues Total Expenses Income before income tax expense Supplemental information: Supplemental Income Statement Elements [Abstract] Capital expenditures Payments to Acquire Property, Plant, and Equipment Depreciation and amortization Depreciation, Depletion and Amortization Amortization included in interest expense Amortization of Financing Costs and Discounts Base Rate [Member] Base Rate [Member] EuroDollar [Member] Eurodollar [Member] CRNF Term Loan [Member] CRNF Term Loan [Member] CRNF Term Loan [Member] CVR 2022 Notes [Member] CVR 2022 Notes [Member] CVR 2022 Notes [Member] ABL Credit Facility [Member] ABL Credit Facility [Member] ABL Credit Facility [Member] Term Loan Facility Line of credit facility, incremental borrowing increase Line of credit facility, incremental borrowing increase Line of credit facility, incremental borrowing increase Letters of Credit Outstanding, Amount Letters of Credit Outstanding, Amount Percentage spread on debt Foreign exchange contracts Foreign Exchange Contract [Member] Other assets [Member] Other Assets [Member] Asset Derivatives, Gross Derivative Asset, Fair Value, Gross Asset Liability Derivatives, Gross Derivative Liability, Fair Value, Gross Liability Asset Derivatives, Netting across contract types Derivative Asset, Fair Value, Amount Offset Against Collateral Liability Derivatives, Netting across contract types Derivative Liability, Fair Value, Amount Offset Against Collateral Asset Derivatives, Total Derivative Asset Derivative contracts at fair value (liability) Derivative Liability Schedule of Notional Amounts of Outstanding Derivative Positions Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance Derivative Instruments, Gain (Loss) [Table Text Block] Senior unsecured notes [Member] Debt facilities [Member] Secured credit facilities [Member] Secured Debt [Member] Other Debt Obligations [Member] Other Debt Obligations [Member] 2022 Notes [Member] 2022 Notes [Member] 2022 Notes [Member] 2020 Notes [Member] 2020 Notes [Member] 2020 Notes [Member] 2019 Notes [Member] 2019 Notes [Member] 2019 Notes [Member] 2017 Notes [Member] 2017 Notes [Member] 2017 Notes [Member] Debt Debt and Capital Lease Obligations Property, Plant and Equipment, Net [Abstract] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property Subject to or Available for Operating Lease [Axis] Property Subject to or Available for Operating Lease [Axis] Property Subject to or Available for Operating Lease [Domain] Property Subject to or Available for Operating Lease [Domain] Railcars [Member] Railcars [Member] Railcars [Member] Real estate properties [Member] Real estate properties [Member] Real estate properties [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Land Land [Member] Buildings and improvements Building and Building Improvements [Member] Machinery, equipment and furniture Machinery, Equipment, and Furniture [Member] Machinery, Equipment, and Furniture [Member] Assets leased to others Assets Leased to Others [Member] Construction in progress Construction in Progress [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, plant and equipment, useful life (in years) Property, Plant and Equipment, Useful Life Property, plant and equipment, gross Property, Plant and Equipment, Gross Less: Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, plant and equipment, net Property, Plant and Equipment, Net Depreciation and amortization expense related to property, plant and equipment Depreciation Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Ferrous Resources [Member] Ferrous Resources [Member] Ferrous Resources [Member] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Available-for-sale Securities [Member] Available-for-sale Securities [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Other Segments and Holding Company [Member] Other Segments and Holding Company [Member] Other Segments and Holding Company [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Net realized and unrealized losses Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Distribution-in-kind Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, distribution in kind Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, distribution in kind Purchases, additions and settlements, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Fair value of investment in Ferrous Resources prior to acquisition of controlling interest Fair value of equity investment in Ferrous Resources prior to acquisition of controlling interest Fair value of equity investment in entity prior to acquisition of controlling interest Equity contracts Equity Contract [Member] Credit contracts Credit Risk Contract [Member] Net gain (loss) from investment activities [Member] Net Gain from Investment Activities [Member] Net Gain from Investment Activities [Member] Gain (Loss) Recognized in Income Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Gaming Segment [Abstract] Gaming Segment [Abstract] Tropicana [Member] Tropicana [Member] Tropicana [Member] Location of operations, State or country [Axis] Location of operations, State or country [Axis] Location of operations, State or country [Axis] State or country of operations [Domain] State or country of operations [Domain] State or country of operations [Domain] MISSOURI MISSOURI LOUISIANA LOUISIANA NEVADA NEVADA INDIANA INDIANA NEW JERSEY NEW JERSEY ARUBA ARUBA MISSISSIPPI MISSISSIPPI Number of casinos Number of Casinos Number of Casinos Owned and Operated Square footage of casino space Casino space, square footage Casino space, square footage Number of slot machines Number of Slot Machines Number of Slot Machines Number of table games Number of Table Games Number of Table Games Number of hotel rooms Number of Hotel Rooms Number of Hotel Rooms Goodwill and Intangible Assets, Net Goodwill and Intangible Assets Disclosure [Text Block] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Distribution declared [Member] Dividend Declared [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Distribution declared per depositary unit Common Stock, Dividends, Per Share, Declared Investments and Related Matters Investments and Other Noncurrent Assets [Text Block] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets [Abstract] Assets [Abstract] Derivative contracts, at fair value (asset) Assets, Fair Value Disclosure Assets, Fair Value Disclosure Liabilities [Abstract] Liabilities [Abstract] Other Liabilities, Fair Value Disclosure Other Liabilities, Fair Value Disclosure Available-for-sale Securities Available-for-sale Securities Trading Securities Trading Securities Financial and Nonfinancial Liabilities, Fair Value Disclosure Financial and Nonfinancial Liabilities, Fair Value Disclosure Determination of what constitutes a segment [Policy Text Block] Segment Reporting, Policy [Policy Text Block] Net Income Per LP Unit [Abstract] Net Income Per LP Unit [Abstract] Schedule Of Earnings Per LP Unit Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Significant Accounting Policies [Table] Schedule of Significant Accounting Policies [Table] Schedule of Significant Accounting Policies [Table] Schedule of Significant Accounting Policies [Line Items] Schedule of Significant Accounting Policies [Line Items] Schedule of Significant Accounting Policies [Line Items] MASSACHUSETTS MASSACHUSETTS FLORIDA FLORIDA ARI [Member] ARI [Member] ARI [Member] Viskase [Member] Viskase [Member] Viskase [Member] ARL [Member] ARL [Member] ARL [Member] Business combination, commitment to purchase, price per share Business combination, commitment to purchase, price per share Business combination, commitment to purchase, price per share Nnumber of Manufacturing Facilities Nnumber of Manufacturing Facilities Nnumber of Manufacturing Facilities Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries, Percentage Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries, Percentage Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries, Percentage Number of Real Estate commercial rental properties Number of Real Estate Properties Number of units of residential housing in future development Number of Units of Residential Housing in Future Development Number of Units of Residential Housing in Future Development Amount of backstop of rights offering Amount of backstop of rights offering Amount of backstop of rights offering Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Loss Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Loss Financial Instruments Financial Instruments Disclosure [Text Block] Schedule of Property, Plant and Equipment, Net Property, Plant and Equipment [Table Text Block] Statement of Financial Position [Abstract] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] ASSETS Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Cash held at consolidated affiliated partnerships and restricted cash Restricted Cash and Cash Equivalents Investments Investments Accounts receivable, net Accounts Receivable, Net Inventories, net Inventory, Net Property, plant and equipment, net Goodwill Goodwill Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Other assets Other Assets Total Assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Accounts payable Accounts Payable Accrued expenses and other liabilities Accrued Liabilities Deferred tax liability Deferred Tax Liabilities, Net Securities sold, not yet purchased, at fair value Financial Instruments Sold, Not yet Purchased, at Fair Value Due to brokers Due to Correspondent Brokers Post-employment benefit liability Postemployment Benefits Liability Total liabilities Liabilities Commitments and contingencies (Note 17) Commitments and Contingencies Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Limited partners: Depositary units: 126,643,279 and 123,103,414 units issued and outstanding at June 30, 2015 and December 31, 2014, respectively Limited Partners' Capital Account General partner General Partners' Capital Account Equity attributable to Icahn Enterprises Stockholders' Equity Attributable to Parent Equity attributable to non-controlling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total Liabilities and Equity Liabilities and Equity Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Related Party Transactions Related Party Transactions Disclosure [Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Icahn Enterprises G.P. [Member] Icahn Enterprises G.P. [Member] Icahn Enterprises G.P. [Member] ACF [Member] ACF [Member] ACF [Member] Starfire Holding Corporation [Member] Starfire Holding Corporation [Member] Starfire Holding Corporation [Member] Members or Partners [Axis] Members or Partners [Axis] Members or Partners, including managing members or members or general partners or limited partners [Axis] Partner Name [Domain] Partner Name [Domain] Partner Name [Domain] Mr. Icahn and his affiliates [Member] Principal Owners and Affiliates [Member] Mr. Icahn and certain other entities beneficially owned by Mr. Icahn Loss Contingencies [Line Items] Loss Contingencies [Line Items] Rent expense on operating leases Operating Leases, Rent Expense Proceeds from Legal Settlements Proceeds from Legal Settlements Insurance Recoveries Insurance Recoveries Reduction in receivable related to litigation settlement Reduction in receivable related to litigation settlement Reduction in receivable related to litigation settlement Litigation receivable Litigation receivable Litigation receivable Accrued environmental liabilities Accrual for Environmental Loss Contingencies Litigation claim gain amount Litigation claim gain amount Litigation claim gain amount Litigation counterclaim amount Litigation counterclaim amount Litigation counterclaim amount Possible material additional losses, above and beyond best estimate of required remediation costs Site Contingency, Loss Exposure in Excess of Accrual, Best Estimate Affiliate ownership in parent company general partner Affiliate ownership in parent company general partner Affiliate ownership in parent company general partner Affiliate ownership interest Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest Defined benefit plan underfunded amount Defined Benefit Plan, Funded Status of Plan Ownership percentage by Mr. Icahn Ownership Percentage by Principal Owner Ownership percentage by principal owner in related party Net worth floor for which distributions to stockholders would be limited while contingent liabilities exist that can be imposed on us Subsidiary Indemnity Agreement, Pension Funding Contingencies As A Result of Being In The Controlled Group, Distribution Limitation, Net Worth Floor Subsidiary Indemnity Agreement, Pension Funding Contingencies As A Result of Being In The Controlled Group, Distribution Limitation, Net Worth Floor Asset retirement obligation Asset Retirement Obligation Environmental remediation expense Environmental Remediation Expense Cost of RINs Cost of RINs Expenses incurred to purchase additional rewnewable identification numbers Biofuel blending obligation Biofuel blending obligation Biofuel blending obligation Inventories, Net [Abstract] Inventories, Net [Abstract] Schedule of Inventory, Current [Table Text Block] Schedule of Inventory, Current [Table Text Block] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Foreign currency contracts Cost of goods sold Cost of Sales [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Equity Securities [Member] Equity Securities [Member] Corporate Debt Securities [Member] Corporate Debt Securities [Member] Collateralized Mortgage Backed Securities [Member] Collateralized Mortgage Backed Securities [Member] Debt Securities [Member] Debt Securities [Member] Investment Sector [Axis] Investment Sector [Axis] Investment Sector [Domain] Investment Sector [Domain] Basic Materials [Member] Basic Materials [Member] Basic Materials [Member] Communications [Member] Communications [Member] Communications [Member] Consumer, non-cyclical [Member] Consumer, non-cyclical [Member] Consumer, non-cyclical [Member] Consumer, cyclical [Member] Consumer, cyclical [Member] Consumer, cyclical [Member] Diversified [Member] Diversified [Member] Diversified [Member] Energy sector [Member] Energy sector [Member] Energy sector [Member] Financial [Member] Financial [Member] Financial [Member] Funds [Member] Funds [Member] Funds [Member] Industrial [Member] Industrial [Member] Industrial [Member] Technology [Member] Technology [Member] Technology [Member] Utilities [Member] Utilities [Member] Utilities [Member] Investments [Abstract] Investments [Abstract] Securities sold, not yet purchased, at fair value: Financial Instruments Sold, Not yet Purchased, at Fair Value [Abstract] Marketable Securities, Equity Securities [Abstract] Marketable Securities, Equity Securities [Abstract] Mortgage-backed securities: [Abstract] Mortgage-backed securities: [Abstract] Mortgage-backed securities: [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Accounting Policies [Table] Accounting Policies [Table] Accounting Policies Revenue Recognition, Policy [Policy Text Block] Revenue Recognition, Policy [Policy Text Block] Mining exploration and evaluation expenditures, Policy [Policy Text Block] Mining exploration and evaluation expenditures, Policy [Policy Text Block] Mining exploration and evaluation expenditures, Policy [Policy Text Block] Mining properties and mine development expenditures, Policy [Policy Text Block] Mining properties and mine development expenditures, Policy [Policy Text Block] Mining properties and mine development expenditures, Policy [Policy Text Block] Inventory, Policy [Policy Text Block] Inventory, Policy [Policy Text Block] Reclassifications [Policy Text Block] Reclassification, Policy [Policy Text Block] Principals of consolidation [Policy Text Block] Consolidation, Variable Interest Entity, Policy [Policy Text Block] Equity Method Investments, Policy [Policy Text Block] Equity Method Investments, Policy [Policy Text Block] Fair value of financial instruments [Policy Text Block] Fair Value of Financial Instruments, Policy [Policy Text Block] Restricted cash [Policy Text Block] Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Adoption of new accounting pronouncements [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Recently issued accounting pronouncements [Policy Text Block] Description of New Accounting Pronouncements Not yet Adopted [Text Block] Raw materials Inventory, Raw Materials, Net of Reserves Work in process Inventory, Work in Process, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Inventory, net Compensation and Retirement Disclosure [Abstract] Pensions,Other Post-employment Benefits and Employee Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Goodwill and Intangible Assets [Table] Goodwill and Intangible Assets [Table] Goodwill and Intangible Assets [Table] Fertilizer reporting unit [Member] Fertilizer reporting unit [Member] Fertilizer reporting unit [Member] Goodwill and Intangible Assets [Line Items] Goodwill and Intangible Assets [Line Items] Goodwill and Intangible Assets [Line Items] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets Amortization expense associated with definite-lived intangible assets Amortization of Intangible Assets Goodwill, Impairment Loss Goodwill, Impairment Loss Letter of Credit [Member] Letter of Credit [Member] Tropicana Credit Facilities [Member] Tropicana Credit Facilities [Member] Tropicana Credit Facilities [Member] Viskase Term Loan [Member] Viskase Term Loan [Member] Viskase Term Loan [Member] Secured Debt [Member] Senior credit facility Line of credit annual fee on borrowed amount Line of credit annual fee on borrowed amount The fee, expressed as a percentage of the line of credit facility, for used credit capacity under the credit facility. Revolving credit facility, unused borrowing availability Line of Credit Facility, Remaining Borrowing Capacity Debt discount rate at time of issuance Debt discount rate at time of issuance Debt discount rate at time of issuance Letter of Credit Facility, Maximum Borrowing Capacity Letter of Credit Facility, Maximum Borrowing Capacity Letter of Credit Facility, Maximum Borrowing Capacity Amortization of financing costs and discounts Tranche B Loan [Member] Tranche B Loan [Member] Tranche B Loan [Member] Tranche C Loan [Member] Tranche C Loan [Member] Tranche C Loan [Member] Federal-Mogul Replacement Revolving Credit Facility [Member] Federal-Mogul Replacement Revolving Credit Facility [Member] Federal-Mogul Replacement Revolving Credit Facility [Member] Long-term Debt, Gross Long-term Debt, Gross Line of Credit Facility Aggregate Principal Amount Upon Acceleration Line of Credit Facility Aggregate Principal Amount Upon Acceleration Line of Credit Facility Aggregate Principal Amount Upon Acceleration Letters of credit outstanding Schedule of Investments [Table] Schedule of Investments [Table] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Equity method investments Equity Method Investments Other investments Other Investments Investments Proceeds from Sale of Available-for-sale Securities Proceeds from Sale of Available-for-sale Securities Cost basis of available for sale securities sold during the period Cost basis of available for sale securities sold during the period Cost basis of available for sale securities sold during the period Reclassification adjustment from AOCI for sale of securities, before tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Cost basis of available for sale securities transferred to trading securities Cost basis of available for sale securities transferred to trading securities Cost basis of available for sale securities transferred to trading securities Available-for-sale Securities, Transfers to Trading, Gains (Losses) Available-for-sale Securities, Transfers to Trading, Gains (Losses) Trading Securities, Realized Gain Trading Securities, Realized Gain Credit swaps(1) Credit Default Swap, Selling Protection [Member] Equity swaps Equity Swap [Member] Foreign currency forwards Foreign Exchange Forward [Member] Credit Default Swap [Member] Credit Default Swap [Member] Long Notional Exposure Notional Exposure of Derivatives, Long Position Notional Exposure of Derivatives, Long Position Related party agreement [Axis] Related party agreement [Axis] Related party agreement [Axis] Related party agreement [Domain] Related party agreement [Domain] [Domain] for Related party agreement [Axis] Agreements with ACF [Member] Agreements with ACF [Member] Agreements with ACF [Member] Icahn Capital [Member] Icahn Capital [Member] Icahn Capital [Member] Investment Funds [Member] Investment Funds [Member] The Onshore Fund (Icahn Partners LP) and the Offshore Master Funds are collectively referred to as the “Investment Funds". The “Offshore Master Funds” consist of (i) Icahn Partners Master Fund LP, or Master Fund I, (ii) Icahn Partners Master Fund II LP, or Master Fund II and (iii) Icahn Partners Master Fund III LP, or Master Fund III. AEP Leasing [Member] AEP Leasing [Member] AEP Leasing [Member] Related Party Transactions, by Transaction Type [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Investment in Funds [Member] Hedge Funds, Equity [Member] Expense sharing agreement [Member] Expense Sharing Agreement [Member] Expense Sharing Agreement [Member] Railcar component sales [Member] Railcar component sales [Member] Railcar component sales [Member] Railcar Sales [Member] Railcar Sales [Member] Railcar Sales [Member] Purchase of railcars [Member] Purchase of railcars [Member] Purchase of railcars [Member] Investment in funds Investment in funds Investment in funds Related party transaction, balance Related party transaction, balance Related party transaction, balance Percentage fair value of investments in Funds that is attributable to Mr. Icahn Percentage fair value of investments in Funds that is attributable to Mr. Icahn Percentage fair value of investments in Funds that is attributable to Mr. Icahn Expenses charged by related party Related Party Transaction, Amounts of Transaction Revenues from transactions with related party Related Party Transaction, Other Revenues from Transactions with Related Party Unrecorded unconditional purchase obligation, minimum quantity required Unrecorded Unconditional Purchase Obligation, Minimum Quantity Required Expenses from transactions with related party Related Party Transaction, Expenses from Transactions with Related Party Unrecorded unconditional purchase obligation Unrecorded Unconditional Purchase Obligation Option to purchase additinal railcars, number of cars Option to purchase additinal railcars, number of cars Option to purchase additinal railcars, number of cars Option to purchase additional railcars Option to purchase additional railcars Option to purchase additional railcars Option exercised to purchase additinal railcars, number of cars Option exercised to purchase additinal railcars, number of cars Option exercised to purchase additional railcars, number of cars Option exercised to purchase additional railcars Option exercised to purchase additional railcars Option exercised to purchase additional railcars Entities [Table] Entities [Table] Icahn Enterprises G.P. [Member] Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Restricted cash [Member] Restricted cash [Member] Restricted cash Entity Information [Line Items] Entity Information [Line Items] Percentage of equity ownership in operating subsidiary General partner ownership percentage in Icahn Enterprises Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest General partner ownership interest in Icahn Enterprises Holdings Subsidiary of Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Subsidiary of Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Aggregate general partner ownership interest of parent and operating subsidiary Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Aggregate Ownership interest of Parent and Holding Company Subsidiaries Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Aggregate Ownership interest of Parent and Holding Company Subsidiaries Affiliate ownership interest in Icahn Enterprises (in units) Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest, Units Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest, Units Affiliate ownership interest in Icahn Enterprises Fair value of long-term debt Long-term Debt, Fair Value Component of Other Income (Loss), Net [Table] Component of Other Income (Loss), Ne [Table] Component of Other Income (Loss), Net [Table] Realized and unrealized (loss) gain on derivatives, net (Note 6) Unrealized gain loss on derivatives [Member] Unrealized gain loss on derivatives Gain on acquisition (Note 2) Gain on acquisition [Member] Gain on acquisition [Member] Gain on disposition of assets, net Gain (loss) on dispositions of assets [Member] Gain (loss) on dispositions of assets Tax settlement gain Settlement loss with taxing authority [Member] Settlement loss with taxing authority [Member] Equity earnings from non-consolidated affiliates Income (loss) from non-consolidated affiliates [Member] Income (loss) from non-consolidated affiliates [Member] Foreign currency translation loss Foreign Currency Gain (Loss) [Member] Other Component of Other Income (Loss), Net [Line Items] Component of Other Income (Loss), Net [Line Items] Component of Other Income (Loss), Net [Line Items] Income Tax Disclosure [Abstract] Income tax expense Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Statutory federal income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Inventory Disclosure [Text Block] Inventory Disclosure [Text Block] Schedule of Long-term Debt Instruments Schedule of Long-term Debt Instruments [Table Text Block] Property, Plant and Equipment, Net Property, Plant and Equipment Disclosure [Text Block] Equity: Stockholders' Equity Attributable to Parent [Abstract] Limited partners: Depositary units issued Limited Partners' Capital Account, Units Issued Limited partners: Depositary units outstanding Limited Partners' Capital Account, Units Outstanding Accumulated Other Comprehensive Income (Loss) [Abstract] Accumulated Other Comprehensive Income (Loss) [Abstract] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income (Loss) [Text Block] Accumulated Other Comprehensive Income (Loss) [Text Block] Statement of Partners' Capital [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Parent [Member] Parent [Member] Non-controlling Interests Noncontrolling Interest [Member] Increase (Decrease) in Partners' Capital [Roll Forward] Increase (Decrease) in Partners' Capital [Roll Forward] Equity Net income Other comprehensive loss Partnership distributions Partners' Capital Account, Distributions Investment segment contributions Investment Management Contributions Contributions from non-controlling investors in the Private Funds. Distributions to non-controlling interests in subsidiaries Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Proceeds from subsidiary equity offerings Proceeds from Noncontrolling Interests Acquisitions Noncontrolling Interest, Increase from Business Combination Changes in subsidiary equity and other Stockholders' Equity, Other Equity Holding Company [Member] Condensed Financial Statements, Captions [Line Items] Condensed Financial Statements, Captions [Line Items] Goodwill and intangible assets, net Intangible Assets, Net (Including Goodwill) Other assets Other Assets and Due from Correspondent Brokers Other Assets and Due from Correspondent Brokers Accounts payable, accrued expenses and other liabilities Accounts Payable and Accrued Liabilities Total assets Equity attributable to Icahn Enterprises Total equity Total liabilities and equity Operating Units [Abstract] Operating Units. [Abstract] Operating Units Operating Units [Text Block] Supplemental information regarding the entity's reportable segments, as a single block text, including narrative business descriptions of reportable segments and relevent financial disclosures specific to reprortable segments no disclosed elsewhere. Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Transfer out Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Gross proceeds Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Condensed statements of operations by reporting segment Condensed Income Statement [Table Text Block] Condensed balance sheets by reporting segment Condensed Financial Statements [Table Text Block] Segment information Schedule of Segment Reporting Information, by Segment [Table Text Block] Put Option [Member] Put Option [Member] Maximum payout amounts relating to put options written Open Option Contract Written, Potential Payment Amount The maximum payout of the open option contracts written for the investment. Open Option Contracts Written, Covered Put Options on Existing Short Positions Open Option Contracts Written, Covered Put Options on Existing Short Positions Open Option Contracts Written, Covered Put Options on Existing Short Positions Realized and unrealized gain (loss) on derivatives, net Unrealized Gain (Loss) on Derivatives Fair value of derivative instruments with credit-risk related contingent features in a liability position Credit Risk Derivative Liabilities, at Fair Value Cash collateral posted for derivative positions Collateral Already Posted, Aggregate Fair Value Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Debt Repurchase Description [Axis] Debt Repurchase Description [Axis] Debt Repurchase Description [Axis] Debt Repurchase Description [Domain] Debt Repurchase Description [Domain] Debt Repurchase Description [Domain] Date Range [Axis] Date Range [Axis] Date Range [Axis] Date Range [Domain] Date Range [Domain] Date Range [Domain] Additional 2020 Notes [Member] Additional 2020 Notes [Member] Additional 2020 Notes [Member] 2010-2012 Notes [Member] 2010-2012 Notes [Member] 2010-2012 Notes [Member] Additional indebtedness allowed per debt covenants Additional Indebtedness Allowed Per Debt Covenants Additional Indebtedness Allowed Per Debt Covenants Consolidated Statements of Cash Flows [Abstract] Consolidated Statements of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by (used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Net gain from securities transactions Gain (Loss) on Investments Purchases of securities Payments to Acquire Marketable Securities Proceeds from sales of securities Proceeds from Sale and Maturity of Marketable Securities Purchases to cover securities sold, not yet purchased Purchases to Cover Securities Sold Not Yet Purchased Purchases to cover securities sold not yet purchased Proceeds from securities sold, not yet purchased Investment Sold, Not yet Purchased, Sale Proceeds Changes in receivables and payables relating to securities transactions Increase (Decrease) in Broker-Dealer Related Receivables (Payables), Net Equity earnings from non-consolidated affiliates Income (Loss) from Equity Method Investments Depreciation and amortization Depreciation and amortization, including non-cash interest expense The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets as well as the non-cash portion of interest expense as a result of amortizing debt discount, premiums and financing costs. Deferred taxes Increase (Decrease) in Deferred Income Taxes Other, net Other Operating Activities, Cash Flow Statement Changes in cash held at consolidated affiliated partnerships and restricted cash Increase (Decrease) in Restricted Cash for Operating Activities Changes in other operating assets and liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Capital expenditures Payments to Acquire Productive Assets Acquisition of business, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Proceeds from sale of investments Proceeds from Sale of Other Investments Net proceeds from the sale and disposition of assets Proceeds from Sale of Productive Assets Purchases of investments Payments to Acquire Investments Other, net Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Capital contribution by non-controlling interests Capital Contributions by Non-controlling Interests Cash contributions by non-controlling investors in the Private Funds Partnership distributions Distribution Made to Limited Partner, Cash Distributions Paid Proceeds from offering of subsidiary equity Proceeds from Issuance or Sale of Equity Distributions to non-controlling interests in subsidiaries Payments to Noncontrolling Interests Proceeds from issuance of senior unsecured notes Proceeds from Issuance of Unsecured Debt Proceeds from other borrowings Proceeds from Other Debt Repayments of other borrowings Repayments of Unsecured Debt Repayments of other borrowings Repayments of Debt and Capital Lease Obligations Other, net Proceeds from (Payments for) Other Financing Activities Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net (decrease) increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Supplemental information: Supplemental Cash Flow Information [Abstract] Cash payments for interest, net of amounts capitalized Interest Paid, Net Net cash (refunds) payments for income taxes Income Taxes Paid, Net Changes in accounts payable related to construction in progress additions Construction in Progress Expenditures Incurred but Not yet Paid Changes in accounts payable related to construction in progress additions Changes in accounts payable related to construction in progress additions Changes in accounts payable related to construction in progress additions Description of Business and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Schedule of Net Periodic Benefit Costs Schedule of Net Benefit Costs [Table Text Block] Energy Segment [Abstract] Energy Segment [Abstract] Equity transaction type [Axis] Equity transaction type [Axis] Equity transaction type [Axis] Equity transaction type [Domain] Equity transaction type [Domain] [Domain] for Equity transaction type [Axis] Secondary offering [Member] Secondary offering [Member] Secondary offering [Member] Property location [Axis] Property location [Axis] Property location [Axis] Location [Domain] Location [Domain] Coffeyville, Kansas [Member] Coffeyville, Kansas [Member] Coffeyville, Kansas [Member] Wynnewood, Oklahoma [Member] Wynnewood, Oklahoma [Member] Wynnewood, Oklahoma [Member] Coffeyville refinery [Member] Coffeyville refinery [Member] Coffeyville refinery Wynnewood refinery [Member] Wynnewood refinery [Member] Wynnewood refinery Oil and Gas Production Type [Axis] Oil and Gas Production Type [Axis] Petroleum [Member] Crude Oil [Member] Nitrogen Fertilizer [Member] 325311 Nitrogenous Fertilizer Manufacturing [Member] CVR Refining, LP [Member] CVR Refining, LP [Member] CVR Refining, LP [Member] CVR Partners, LP [Member] CVR Partners, LP [Member] CVR Partners, LP [Member] CVR Energy, Inc. [Member] CVR Energy, Inc. [Member] CVR Energy, Inc. [Member] Noncontrolling Interest, Increase from Subsidiary Equity Issuance Noncontrolling Interest, Increase from Subsidiary Equity Issuance Barrels per day Production, Barrels of Oil Per Day Production, Barrels of Oil Per Day Acres of land Acres of land Acres of land Ton-per-day ammonia unit facility Production, Tons of Ammonia Per Day Production, Tons of Ammonia Per Day Ton-per-day of Urea and Ammonium Nitrate unit facility Production, Tons of Urea and Ammonium Nitrate Per Day Production, Tons of Urea and Ammonium Nitrate Per Day Cubic feet of hydrogen per day gasifiation complex Production, Cubic Feet of Hydrogen Per Day Production, Cubic Feet of Hydrogen Per Day Investment Segment [Abstract] Investment Segment [Abstract] Operating Units [Table] OPerating Units [Table] OPerating Units [Table] Fair value of our interest in Funds of subsidiary Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest, Fair Value The fair value of investment held in the subsidiary investment funds by the limited liability company or limited partnership. Schedule of Other Nonoperating Income (Expense) Other Income (Loss), Net [Table Text Block] Table for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions. [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of changes in accumulated other comprehensive income [Table Text Block] Schedule of changes in accumulated other comprehensive income [Table Text Block] Net Periodic Benefit Cost [Abstract] Net Periodic Benefit Cost [Abstract] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Pension Benefits Pension Plan [Member] OPEB Other Postretirement Benefit Plan [Member] Net Periodic Benefit Cost [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return on Plan Assets Amortization of actuarial losses Defined Benefit Plan, Amortization of Gains (Losses) Amortization of prior service credit Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Equity method investments [Member] Equity Method Investments [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair value of equity method investment under fair value option Equity Method Investments, Fair Value Disclosure Fair value option, recorded gains (losses) Fair Value, Option, Changes in Fair Value, Gain (Loss) Portion of trading gains that relates to trading securities still held Trading Securities, Change in Unrealized Holding Gain (Loss) Schedule of Definite-Lived and Indefinite-Lived Intangible Assets, by Segment [Table] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets, by Segment [Table] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets, by Segment [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer relationships Customer Relationships [Member] Developed technology Developed Technology Rights [Member] In-place leases Leases, Acquired-in-Place [Member] Gasification technology license Gasification Technology [Member] Gasification Technology [Member] Other Unclassified Indefinite-lived Intangible Assets [Member] Indefinite-lived Intangible Assets by Major Class [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived intangible assets: Indefinite-lived Intangible Assets, Major Class Name [Domain] Trademarks and brand names Trademarks [Member] Gaming licenses Gaming license [Member] Gaming license Intangible Assets, [Line Items] Finite-Lived and Infinite-Lived Intangible Assets, by Segment [Line Items] Finite-Lived and Infinite-Lived Intangible Assets, by Segment [Line Items] Definite-lived intangible assets: [Abstract] Finite-Lived Intangible Assets, Gross and Net [Abstract] Finite-Lived Intangible Assets, Gross and Net [Abstract] Definite-lived intangible assets, Gross Carrying Amount Finite-Lived Intangible Assets, Gross Definite-lived intangible assets, Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Definite-lived intangible assets, Net Carrying Value Finite-Lived Intangible Assets, Net Indefinite-lived intangible assets: [Abstract] Indefinite-Lived Intangible Assets, Gross and Net [Abstract] Indefinite-Lived Intangible Assets, Gross and Net [Abstract] Indefinite-lived intangible assets, Net Carrying Value Indefinite-Lived Intangible Assets (Excluding Goodwill) Intangible assets, net Net Income Per LP Unit Earnings Per Share [Text Block] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill [Line Items] Goodwill [Line Items] Goodwill, Gross Goodwill, Gross Goodwill, Accumulated Impairment Goodwill, Impaired, Accumulated Impairment Loss Goodwill, Net Carrying Value Interest rate swap contracts Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] Asset Derivatives, Total Derivative contracts at fair value (liability) Income Taxes Income Tax Disclosure [Text Block] AOCI, Post-employment benefts, net of tax Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax AOCI, Hedge instruments, net of tax Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax AOCI, Translation adjustments and other, net of tax Accumulated Other Comprehensive Income (Loss), Translation adjustments and other, net of tax Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses. Also includes other immaterial balances. Accumulated other comprehensive loss, net of tax OCI, Post-employment benefts before reclassificaitons, net of tax Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments, Net of Tax OCI, Hedge instruments before reclassificaitons, net of tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax OCI, Translation adjustments and other before reclassificaitons, net of tax Other comprehensive income, translation adjustments and other, before reclassificaitons, net of tax Other comprehensive income, translation adjustments and other, before reclassificaitons, net of tax Other comprehensive income, before reclassifications to income Other comprehensive income, before reclassifications to income Other comprehensive income, before reclassifications to income OCI, Post-employment benefts reclassificaitons to income, net of tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax OCI, Hedge instruments reclassificaitons to income, net of tax OCI, Translation adjustments and other reclassificaitons to income, net of tax Reclassificaion of translation adjustments and other in AOCI into earnings, net of tax Reclassificaion of translation adjustments and other in AOCI into earnings, net of tax Other comprehensive income, portion representing reclassificaitons to earnings Other comprehensive income, portion representing reclassificaitons to earnings Other comprehensive income, portion representing reclassificaitons to earnings OCI, Post-employment benefts, net of tax OCI, Hedge instruments, net of tax OCI, Translation adjustments and other, net of tax Schedule Of Earnings Per LP Unit [Table] Schedule Of Earnings Per LP Unit [Table] Schedule Of Earnings Per LP Unit [Table] Ownership percentage [Member] Ownership percentage [Member] Ownership percentage [Member] Capital Units by Class [Axis] Capital Units by Class [Axis] Capital Unit, Class [Domain] Capital Unit, Class [Domain] Depositary units [Member] Common Stock [Member] Earnings Per LP Unit [Line Items] Earnings Per LP Unit [Line Items] Earnings Per LP Unit [Line Items] Net income attributable to Icahn Enterprises allocable to limited partners (98.01% allocation) Distribution Made to Limited Partner, Unit Distribution Distribution Made to Limited Partner, Unit Distribution