Related Party Transactions	3 Months Ended
Mar. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions. Our second amended and restated agreement of limited partnership expressly permits us to enter into transactions with our general partner or any of its affiliates, including, without limitation, buying or selling properties from or to our general partner and any of its affiliates and borrowing and lending money from or to our general partner and any of its affiliates, subject to limitations contained in our partnership agreement and the Delaware Revised Uniform Limited Partnership Act. The indentures governing our indebtedness contain certain covenants applicable to transactions with affiliates. Investment Funds During the three months ended March 31, 2018 and 2017, Mr. Icahn and his affiliates (excluding us) invested $280 million and $600 million, respectively, in the Investment Funds, net of redemptions. As of March 31, 2018 and December 31, 2017, the total fair market value of investments in the Investment Funds made by Mr. Icahn and his affiliates (excluding us) was approximately $4.9 billion and $4.4 billion, respectively, representing approximately 60% and 59% of the Investment Funds' assets under management as of each respective date. We pay for expenses pertaining to the operation, administration and investment activities of our Investment segment for the benefit of the Investment Funds (including salaries, benefits and rent). Effective April 1, 2011, based on an expense-sharing arrangement, certain expenses borne by us are reimbursed by the Investment Funds. For the three months ended March 31, 2018 and 2017, $1 million and $2 million, respectively, was allocated to the Investment Funds based on this expense-sharing arrangement. Hertz Global Holdings, Inc. As discussed in Note 4, "Investments and Related Matters," the Investment Funds have an investment in the common stock of Hertz Global Holdings, Inc. ("Hertz") measured at fair value that would have otherwise been subject to the equity method of accounting. Icahn Automotive provides services to Hertz in the ordinary course of business. For the three months ended March 31, 2018, revenue from Hertz was $6 million. Additionally, Federal-Mogul had payments to Hertz in the ordinary course of business of $1 million for the three months ended March 31, 2018. In addition to our transactions with Hertz disclosed above, in January 2018, a wholly owned subsidiary of ours entered into a Master Motor Vehicle Lease and Management Agreement with The Hertz Corporation, a subsidiary of Hertz Global Holdings, Inc. (collectively, "Hertz"), pursuant to which Hertz granted us the option to acquire certain vehicles from Hertz at rates aligned with the rates at which Hertz sells vehicles to third parties. Under this agreement, Hertz will lease the vehicles purchased by us from Hertz, or from third parties, under a mutually developed fleet plan and Hertz will manage, service, repair, sell and maintain those leased vehicles on behalf of us. Additionally, Hertz will rent the leased vehicles to transportation network company drivers from rental counters within locations leased or owned by us. This agreement has an initial term of 18 months and is subject to automatic six-month renewals thereafter, unless terminated by either party (with or without cause) prior to the start of any such six-month renewal. Our agreement with Hertz was unanimously approved by the independent directors of Icahn Enterprises' audit committee. Transactions with Hertz in accordance with this agreement were immaterial for the three months ended March 31, 2018. ACF Industries, Inc. Our Railcar segment has certain transactions with ACF Industries LLC ("ACF"), an affiliate of Mr. Icahn, under various agreements, as well as on a purchase order basis. ACF is a manufacturer and fabricator of specialty railcar parts and miscellaneous steel products. Agreements and transactions with ACF include the following: •Railcar component purchases from ACF •Railcar parts purchases from and sales to ACF •Railcar purchasing and engineering services agreement with ACF •Lease of certain intellectual property to ACF •Railcar repair services and support for ACF •Railcar purchases from ACF (prior to June 1, 2017) Purchases from ACF were $1 million and $2 million for the three months ended March 31, 2018 and 2017, respectively. For each of the three months ended March 31, 2018 and 2017, revenues from ACF were not material. Insight Portfolio Group LLC Insight Portfolio Group LLC ("Insight Portfolio Group") is an entity formed and controlled by Mr. Icahn in order to maximize the potential buying power of a group of entities with which Mr. Icahn has a relationship in negotiating with a wide range of suppliers of goods, services and tangible and intangible property at negotiated rates. Icahn Enterprises Holdings has a minority equity interest in Insight Portfolio Group and agreed to pay a portion of Insight Portfolio Group's operating expenses. In addition to the minority equity interest held by Icahn Enterprises Holdings, certain subsidiaries of ours, including Federal-Mogul, CVR Energy, PSC Metals, ARI, ARL (prior to June 1, 2017), Tropicana, Viskase and WPH also acquired minority equity interests in Insight Portfolio Group and agreed to pay a portion of Insight Portfolio Group's operating expenses. A number of other entities with which Mr. Icahn has a relationship also have minority equity interests in Insight Portfolio Group and also agreed to pay certain of Insight Portfolio Group's operating expenses. For each of the three months ended March 31, 2018 and 2017, we and certain of our subsidiaries paid certain of Insight Portfolio Group's operating expenses of $2 million and $1 million, respectively, in respect to certain of Insight Portfolio Group's operating expenses.

Related Party Transactions.

Our second amended and restated agreement of limited partnership expressly permits us to enter into transactions with our general partner or any of its affiliates, including, without limitation, buying or selling properties from or to our general partner and any of its affiliates and borrowing and lending money from or to our general partner and any of its affiliates, subject to limitations contained in our partnership agreement and the Delaware Revised Uniform Limited Partnership Act. The indentures governing our indebtedness contain certain covenants applicable to transactions with affiliates.

Investment Funds

During the three months ended March 31, 2018 and 2017, Mr. Icahn and his affiliates (excluding us) invested $280 million and $600 million, respectively, in the Investment Funds, net of redemptions. As of March 31, 2018 and December 31, 2017, the total fair market value of investments in the Investment Funds made by Mr. Icahn and his affiliates (excluding us) was approximately $4.9 billion and $4.4 billion, respectively, representing approximately 60% and 59% of the Investment Funds' assets under management as of each respective date.

We pay for expenses pertaining to the operation, administration and investment activities of our Investment segment for the benefit of the Investment Funds (including salaries, benefits and rent). Effective April 1, 2011, based on an expense-sharing arrangement, certain expenses borne by us are reimbursed by the Investment Funds. For the three months ended March 31, 2018 and 2017, $1 million and $2 million, respectively, was allocated to the Investment Funds based on this expense-sharing arrangement.

Hertz Global Holdings, Inc.

As discussed in Note 4, "Investments and Related Matters," the Investment Funds have an investment in the common stock of Hertz Global Holdings, Inc. ("Hertz") measured at fair value that would have otherwise been subject to the equity method of accounting. Icahn Automotive provides services to Hertz in the ordinary course of business. For the three months ended March 31, 2018, revenue from Hertz was $6 million. Additionally, Federal-Mogul had payments to Hertz in the ordinary course of business of $1 million for the three months ended March 31, 2018.

In addition to our transactions with Hertz disclosed above, in January 2018, a wholly owned subsidiary of ours entered into a Master Motor Vehicle Lease and Management Agreement with The Hertz Corporation, a subsidiary of Hertz Global Holdings, Inc. (collectively, "Hertz"), pursuant to which Hertz granted us the option to acquire certain vehicles from Hertz at rates aligned with the rates at which Hertz sells vehicles to third parties. Under this agreement, Hertz will lease the vehicles purchased by us from Hertz, or from third parties, under a mutually developed fleet plan and Hertz will manage, service, repair, sell and maintain those leased vehicles on behalf of us. Additionally, Hertz will rent the leased vehicles to transportation network company drivers from rental counters within locations leased or owned by us. This agreement has an initial term of 18 months and is subject to automatic six-month renewals thereafter, unless terminated by either party (with or without cause) prior to the start of any such six-month renewal. Our agreement with Hertz was unanimously approved by the independent directors of Icahn Enterprises' audit committee. Transactions with Hertz in accordance with this agreement were immaterial for the three months ended March 31, 2018.

ACF Industries, Inc.

Our Railcar segment has certain transactions with ACF Industries LLC ("ACF"), an affiliate of Mr. Icahn, under various agreements, as well as on a purchase order basis. ACF is a manufacturer and fabricator of specialty railcar parts and miscellaneous steel products. Agreements and transactions with ACF include the following:

•Railcar component purchases from ACF

•Railcar parts purchases from and sales to ACF

•Railcar purchasing and engineering services agreement with ACF

•Lease of certain intellectual property to ACF

•Railcar repair services and support for ACF

•Railcar purchases from ACF (prior to June 1, 2017)

Purchases from ACF were $1 million and $2 million for the three months ended March 31, 2018 and 2017, respectively. For each of the three months ended March 31, 2018 and 2017, revenues from ACF were not material.

Insight Portfolio Group LLC

Insight Portfolio Group LLC ("Insight Portfolio Group") is an entity formed and controlled by Mr. Icahn in order to maximize the potential buying power of a group of entities with which Mr. Icahn has a relationship in negotiating with a wide range of suppliers of goods, services and tangible and intangible property at negotiated rates. Icahn Enterprises Holdings has a minority equity interest in Insight Portfolio Group and agreed to pay a portion of Insight Portfolio Group's operating expenses. In addition to the minority equity interest held by Icahn Enterprises Holdings, certain subsidiaries of ours, including Federal-Mogul, CVR Energy, PSC Metals, ARI, ARL (prior to June 1, 2017), Tropicana, Viskase and WPH also acquired minority equity interests in Insight Portfolio Group and agreed to pay a portion of Insight Portfolio Group's operating expenses. A number of other entities with which Mr. Icahn has a relationship also have minority equity interests in Insight Portfolio Group and also agreed to pay certain of Insight Portfolio Group's operating expenses. For each of the three months ended March 31, 2018 and 2017, we and certain of our subsidiaries paid certain of Insight Portfolio Group's operating expenses of $2 million and $1 million, respectively, in respect to certain of Insight Portfolio Group's operating expenses.