Subsequent Events	12 Months Ended
Dec. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events. Icahn Enterprises Distribution On February 27, 2017, the Board of Directors of the general partner of Icahn Enterprises declared a quarterly distribution in the amount of $1.50 per depositary unit, which will be paid on or about April 18, 2017 to depositary unitholders of record at the close of business on March 13, 2017. Depositary unitholders will have until April 5, 2017 to make an election to receive either cash or additional depositary units; if a holder does not make an election, it will automatically be deemed to have elected to receive the dividend in cash. Depositary unitholders who elect to receive additional depositary units will receive units valued at the volume weighted average trading price of the units on NASDAQ during the 5 consecutive trading days ending April 12, 2017. No fractional depositary units will be issued pursuant to the distribution payment. Icahn Enterprises will make a cash payment in lieu of issuing fractional depositary units to any holders electing to receive depositary units. Any holders that would only be eligible to receive a fraction of a depositary unit based on the above calculation will receive a cash payment. Refinancing of 3.50% Senior Unsecured Notes Due 2017 On January 18, 2017, we and a wholly owned subsidiary of ours, Icahn Enterprises Finance (collectively, the “Issuers”), issued $695 million in aggregate principal amount of 6.250% senior notes due 2022 and $500 million in aggregate principal amount of 6.750% senior notes due 2024 (collectively, the "New Notes"). The net proceeds from the sale of the New Notes were approximately $1.192 billion, after deducting the initial purchaser’s discount and commission and estimated fees and expenses related to the offering. These proceeds were used to repay our existing 2017 Notes, including accrued interest, resulting in a de minimis loss on extinguishment during the first quarter of 2017. Interest on the New Notes are payable on February 1 and August 1 of each year, commencing August 1, 2017. The Issuers issued the New Notes under an indenture dated January 18, 2017, among the Issuers, Icahn Enterprises Holdings (the "Guarantor"), and Wilmington Trust Company, as trustee. The indenture contains customary events of defaults and covenants relating to, among other things, the incurrence of debt, affiliate transactions, liens and restricted payments. Prior to maturity of the New Notes, the Issuers may redeem some or all of the notes at certain times by paying a premium as specified in the indenture, plus accrued and unpaid interest. The New Notes and the related guarantee are the senior unsecured obligations of the Issuers and rank equally with all of the Issuers’ and the Guarantor’s existing and future senior unsecured indebtedness and senior to all of the Issuers’ and the Guarantor’s existing and future subordinated indebtedness. All of our senior unsecured notes and the related guarantees are effectively subordinated to the Issuers’ and the Guarantor’s existing and future secured indebtedness to the extent of the collateral securing such indebtedness. All of our senior unsecured notes and the related guarantees are also effectively subordinated to all indebtedness and other liabilities of the Issuers’ subsidiaries other than the Guarantor. In connection with the sale of the New Notes, the Issuers and the Guarantor entered into a certain registration rights agreement dated January 18, 2017 in which the Issuers and the Guarantor have agreed to file a registration statement with the SEC within 120 days of the date of the registration rights agreement and to make an offer to exchange the unregistered New Notes for registered, publicly tradable notes that have substantially identical terms as the New Notes. Icahn Enterprises Rights Offering Subsequent to December 31, 2016, Icahn Enterprises commenced a rights offering entitling holders of the rights to acquire newly issued depositary units of Icahn Enterprises. The purposes of the rights offering are to (i) to enhance Icahn Enterprises' depositary unit holder equity; (ii) to endeavor to improve Icahn Enterprises' credit ratings; and (iii) to raise equity capital to be used for general partnership purposes. The rights offering, which expired on February 22, 2017, was fully subscribed with total basic subscription rights and over-subscription rights being exercised resulting in a total of 11,171,104 depositary units to be issued on or about March 1, 2017 and for aggregate proceeds of $600 million. Affiliates of Mr. Icahn fully exercised all of the basic subscription rights and over-subscription rights allocated to them in the rights offering aggregating 10,525,105 additional depositary units. Mr. Icahn and his affiliates owned approximately 90.1% of Icahn Enterprises' outstanding depositary units as of March 1, 2017. Investment On February 1, 2017, an affiliate of Mr. Icahn invested $600 million in the Investment Funds. On March 1, 2017, we invested $500 million in the Investment Funds. Automotive Federal-Mogul Tender Offer As discussed in Note 3, "Operating Units - Automotive," we commenced the Federal-Mogul Tender Offer which expired on January 18, 2017. As of the expiration, the tendered shares of Federal-Mogul's common stock not already owned by us together with the shares of Federal-Mogul's common stock already owned by us represented approximately 92.4% of the outstanding shares of Federal-Mogul's common stock. Icahn Enterprises accepted for payment all validly tendered shares of Federal-Mogul's common stock that were not properly withdrawn and paid for such shares promptly in accordance with the terms of the Federal-Mogul Tender Offer. The completion of the Federal-Mogul Tender Offer was the first step in Icahn Enterprises' two-step acquisition of Federal-Mogul pursuant to our agreement and plan of merger with Federal-Mogul. All conditions set forth in the agreement and plan of merger with Federal-Mogul were satisfied and, on January 23, 2017, Icahn Enterprises completed the second and final step of the acquisition, a short-form merger under Delaware law. In the short-form merger, a wholly owned subsidiary of ours merged with and into Federal-Mogul and each share of Federal-Mogul common stock not tendered in the Federal-Mogul Tender Offer, other than those as to which holders exercise appraisal rights under Delaware law and those already held by us, were canceled and automatically converted into the right to receive $10.00 per share in cash, without interest and less any applicable tax withholding. This is the same price per share paid in the Federal-Mogul Tender Offer. Following the merger, Federal Mogul's common stock ceased to be traded on the NASDAQ Global Select Market. The Federal-Mogul Tender Offer and subsequent short form merger resulted in an aggregate purchase price of $305 million. As further discussed in 14, "Income Taxes," we have disclosed the details of our Automotive segment's deferred tax assets, including the amount of its tax loss carryforwards and tax credits and the valuation allowance related to these deferred tax assets. In assessing the recoverability of deferred tax assets, we consider whether some portion or all of the deferred tax assets will not be realized based on the recognition threshold and measurement of a tax position in accordance with FASB ASC Topic 740, Income Taxes. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. We consider the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning strategies in making this assessment. In accordance with FASB ASC Topic 740, based upon the level of historic taxable losses and limitations in utilizing the losses generated, we have maintained a deferred tax valuation allowance against a significant portion of our Automotive segment's U.S. tax loss carryforwards and credits. Pursuant to the completion of the Federal-Mogul Tender Offer and short-form merger on January 23, 2017, Federal-Mogul is now wholly owned by us, which may impact the estimated realization of our Automotive segment's deferred tax assets. If future consolidated corporate taxable income increases as expected, which may include the income related to the ARL Initial Sale, we will likely realize the benefits of a significant portion of our Automotive segment's U.S. deferred tax assets. The ARL Initial Sale is expected to close in the second quarter of 2017.

Subsequent Events.

Icahn Enterprises

Distribution

On February 27, 2017, the Board of Directors of the general partner of Icahn Enterprises declared a quarterly distribution in the amount of $1.50 per depositary unit, which will be paid on or about April 18, 2017 to depositary unitholders of record at the close of business on March 13, 2017. Depositary unitholders will have until April 5, 2017 to make an election to receive either cash or additional depositary units; if a holder does not make an election, it will automatically be deemed to have elected to receive the dividend in cash. Depositary unitholders who elect to receive additional depositary units will receive units valued at the volume weighted average trading price of the units on NASDAQ during the 5 consecutive trading days ending April 12, 2017. No fractional depositary units will be issued pursuant to the distribution payment. Icahn Enterprises will make a cash payment in lieu of issuing fractional depositary units to any holders electing to receive depositary units. Any holders that would only be eligible to receive a fraction of a depositary unit based on the above calculation will receive a cash payment.

Refinancing of 3.50% Senior Unsecured Notes Due 2017

On January 18, 2017, we and a wholly owned subsidiary of ours, Icahn Enterprises Finance (collectively, the “Issuers”), issued $695 million in aggregate principal amount of 6.250% senior notes due 2022 and $500 million in aggregate principal amount of 6.750% senior notes due 2024 (collectively, the "New Notes"). The net proceeds from the sale of the New Notes were approximately $1.192 billion, after deducting the initial purchaser’s discount and commission and estimated fees and expenses related to the offering. These proceeds were used to repay our existing 2017 Notes, including accrued interest, resulting in a de minimis loss on extinguishment during the first quarter of 2017. Interest on the New Notes are payable on February 1 and August 1 of each year, commencing August 1, 2017. The Issuers issued the New Notes under an indenture dated January 18, 2017, among the Issuers, Icahn Enterprises Holdings (the "Guarantor"), and Wilmington Trust Company, as trustee. The indenture contains customary events of defaults and covenants relating to, among other things, the incurrence of debt, affiliate transactions, liens and restricted payments. Prior to maturity of the New Notes, the Issuers may redeem some or all of the notes at certain times by paying a premium as specified in the indenture, plus accrued and unpaid interest.

The New Notes and the related guarantee are the senior unsecured obligations of the Issuers and rank equally with all of the Issuers’ and the Guarantor’s existing and future senior unsecured indebtedness and senior to all of the Issuers’ and the Guarantor’s existing and future subordinated indebtedness. All of our senior unsecured notes and the related guarantees are effectively subordinated to the Issuers’ and the Guarantor’s existing and future secured indebtedness to the extent of the collateral securing such indebtedness. All of our senior unsecured notes and the related guarantees are also effectively subordinated to all indebtedness and other liabilities of the Issuers’ subsidiaries other than the Guarantor.

In connection with the sale of the New Notes, the Issuers and the Guarantor entered into a certain registration rights agreement dated January 18, 2017 in which the Issuers and the Guarantor have agreed to file a registration statement with the SEC within 120 days of the date of the registration rights agreement and to make an offer to exchange the unregistered New Notes for registered, publicly tradable notes that have substantially identical terms as the New Notes.

Icahn Enterprises Rights Offering

Subsequent to December 31, 2016, Icahn Enterprises commenced a rights offering entitling holders of the rights to acquire newly issued depositary units of Icahn Enterprises. The purposes of the rights offering are to (i) to enhance Icahn Enterprises' depositary unit holder equity; (ii) to endeavor to improve Icahn Enterprises' credit ratings; and (iii) to raise equity capital to be used for general partnership purposes. The rights offering, which expired on February 22, 2017, was fully subscribed with total basic subscription rights and over-subscription rights being exercised resulting in a total of 11,171,104 depositary units to be issued on or about March 1, 2017 and for aggregate proceeds of $600 million. Affiliates of Mr. Icahn fully exercised all of the basic subscription rights and over-subscription rights allocated to them in the rights offering aggregating 10,525,105 additional depositary units. Mr. Icahn and his affiliates owned approximately 90.1% of Icahn Enterprises' outstanding depositary units as of March 1, 2017.

Investment

On February 1, 2017, an affiliate of Mr. Icahn invested $600 million in the Investment Funds.

On March 1, 2017, we invested $500 million in the Investment Funds.

Automotive

Federal-Mogul Tender Offer

As discussed in Note 3, "Operating Units - Automotive," we commenced the Federal-Mogul Tender Offer which expired on January 18, 2017. As of the expiration, the tendered shares of Federal-Mogul's common stock not already owned by us together with the shares of Federal-Mogul's common stock already owned by us represented approximately 92.4% of the outstanding shares of Federal-Mogul's common stock. Icahn Enterprises accepted for payment all validly tendered shares of Federal-Mogul's common stock that were not properly withdrawn and paid for such shares promptly in accordance with the terms of the Federal-Mogul Tender Offer.

The completion of the Federal-Mogul Tender Offer was the first step in Icahn Enterprises' two-step acquisition of Federal-Mogul pursuant to our agreement and plan of merger with Federal-Mogul. All conditions set forth in the agreement and plan of merger with Federal-Mogul were satisfied and, on January 23, 2017, Icahn Enterprises completed the second and final step of the acquisition, a short-form merger under Delaware law. In the short-form merger, a wholly owned subsidiary of ours merged with and into Federal-Mogul and each share of Federal-Mogul common stock not tendered in the Federal-Mogul Tender Offer, other than those as to which holders exercise appraisal rights under Delaware law and those already held by us, were canceled and automatically converted into the right to receive $10.00 per share in cash, without interest and less any applicable tax withholding. This is the same price per share paid in the Federal-Mogul Tender Offer. Following the merger, Federal Mogul's common stock ceased to be traded on the NASDAQ Global Select Market. The Federal-Mogul Tender Offer and subsequent short form merger resulted in an aggregate purchase price of $305 million.

As further discussed in 14, "Income Taxes," we have disclosed the details of our Automotive segment's deferred tax assets, including the amount of its tax loss carryforwards and tax credits and the valuation allowance related to these deferred tax assets. In assessing the recoverability of deferred tax assets, we consider whether some portion or all of the deferred tax assets will not be realized based on the recognition threshold and measurement of a tax position in accordance with FASB ASC Topic 740, Income Taxes. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. We consider the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning strategies in making this assessment. In accordance with FASB ASC Topic 740, based upon the level of historic taxable losses and limitations in utilizing the losses generated, we have maintained a deferred tax valuation allowance against a significant portion of our Automotive segment's U.S. tax loss carryforwards and credits. Pursuant to the completion of the Federal-Mogul Tender Offer and short-form merger on January 23, 2017, Federal-Mogul is now wholly owned by us, which may impact the estimated realization of our Automotive segment's deferred tax assets. If future consolidated corporate taxable income increases as expected, which may include the income related to the ARL Initial Sale, we will likely realize the benefits of a significant portion of our Automotive segment's U.S. deferred tax assets. The ARL Initial Sale is expected to close in the second quarter of 2017.