Related Party Transactions	3 Months Ended
Mar. 31, 2015
Related Party Transaction [Line Items]
Related Party Transactions	Related Party Transactions. Our 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 Mr. Icahn, along with his affiliates (excluding Icahn Enterprises and Icahn Enterprises Holdings), makes investments in the Investment Funds. During the first quarter of 2015, affiliates of Mr. Icahn made investments aggregating $245 million in the Investment Funds. As of March 31, 2015 and December 31, 2014, the total fair market value of investments in the Investment Funds made by Mr. Icahn and his affiliates (excluding Icahn Enterprises and Icahn Enterprises Holdings) was approximately $5.2 billion and $4.8 billion, respectively, representing approximately 54% and 53%, respectively, of the Investment Funds' assets under management. Icahn Capital LP ("Icahn Capital") pays 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); such expenses are allocated to Icahn Capital in accordance with each investor's capital accounts in the Investment Funds. Effective April 1, 2011, based on an expense-sharing arrangement, certain expenses borne by Icahn Capital are reimbursed by the Investment Funds, generally when such expenses are paid. For the three months ended March 31, 2015 and 2014, $98 million and $16 million, respectively, was allocated to the Investment Funds based on this expense-sharing arrangement. Railcar Agreements with ACF Industries LLC In January 2013, ARI entered into a purchasing and engineering services agreement and license with ACF Industries LLC ("ACF"), an affiliate of Mr. Icahn. ACF is a leader in the manufacture and fabrication of specialty railcar parts and miscellaneous steel products. The agreement was unanimously approved by the independent directors of ARI’s and Icahn Enterprises' audit committee on the basis that the terms of the agreement were not materially less favorable to ARI than those that could have been obtained in a comparable transaction with an unrelated person. Under this agreement, ARI provides purchasing support and engineering services to ACF in connection with ACF’s manufacture and sale of tank railcars at its facility in Milton, Pennsylvania. Additionally, ARI has granted ACF a nonexclusive, non-assignable license to certain of ARI’s intellectual property, including certain designs, specifications, processes and manufacturing know-how required to manufacture and sell tank railcars during the term of the agreement. In August 2014, ARI and ACF amended this agreement to, among other provisions, extend the termination date to December 31, 2015 from December 31, 2014, subject to certain early termination events. In consideration for the services and license provided by ARI to ACF in conjunction with the agreement, ACF pays ARI a royalty and, if any, a share of the net profits ("ACF Profits") earned on each railcar manufactured and sold by ACF under the agreement, in an aggregate amount equal to 30% of such ACF Profits, as calculated under the agreement. ACF Profits are net of certain of ACF’s start-up and shutdown expenses and certain maintenance capital. If no ACF Profits are realized on a railcar manufactured and sold by ACF pursuant to the agreement, ARI will still be entitled to the royalty for such railcar and will not share in any losses incurred by ACF in connection therewith. In addition, any railcar components supplied by ARI to ACF for the manufacture of these railcars are provided at fair market value. Under the agreement, ACF had the exclusive right to manufacture and sell subject tank railcars for any new orders scheduled for delivery to customers on or before January 31, 2014. ARI has the exclusive right to any sales opportunities for such tank railcars for any new orders scheduled for delivery after that date and through termination of the agreement. ARI also has the right to assign any sales opportunity to ACF, and ACF has the right, but not the obligation, to accept such sales opportunity. Any sales opportunity accepted by ACF will not be reflected in ARI’s orders or backlog. ARI's revenues under this agreement were $2 million and $6 million for the three months ended March 31, 2015 and 2014, respectively, and were recorded for sales of railcar components to ACF and for royalties and profits on railcars sold by ACF. In April 2013, AEP Leasing entered into an agreement (the "ACF Agreement") with ACF whereby AEP Leasing would purchase a total of 1,050 railcars from ACF in 2013 and 2014 for an aggregate purchase price of approximately $150 million. Additionally, AEP Leasing had an option to purchase an additional 500 railcars for an aggregate purchase price of approximately $70 million. During the second quarter of 2014, AEP Leasing exercised its option to purchase an additional 296 railcars for an aggregate purchase price of $42 million. The ACF Agreement was assumed by ARL in connection with our purchase of a 75.0% economic interest in ARL. The ACF Agreement was unanimously approved by Icahn Enterprises' audit committee consisting of independent directors, who were advised by independent counsel and an independent financial advisor on the basis that the terms were not less favorable than those terms that could have been obtained in a comparable transaction with an unaffiliated third party. Under this agreement, purchases of railcars from ACF were $9 million and $28 million for the three months ended March 31, 2015 and 2014, respectively. In addition to the above purchases, on a contract-by-contract basis, ARL purchased $5 million of railcars from ACF for the three months ended March 31, 2015. Insight Portfolio Group LLC Icahn Sourcing, LLC ("Icahn Sourcing") 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 was a member of the buying group in 2012. Prior to December 31, 2012 Icahn Enterprises did not pay Icahn Sourcing any fees or other amounts with respect to the buying group arrangement. In December 2012, Icahn Sourcing advised Icahn Enterprises that effective January 1, 2013 it would restructure its ownership and change its name to Insight Portfolio Group LLC (“Insight Portfolio Group”). In connection with the restructuring, Icahn Enterprises Holdings acquired 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 Icahn Enterprises Holdings, including Federal-Mogul, CVR, Tropicana, ARI, ARL, Viskase, PSC Metals 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 acquired equity interests in Insight Portfolio Group and also agreed to pay certain of Insight Portfolio Group's operating expenses. For each of March 31, 2015 and 2014, immaterial amounts were paid in respect to certain of the Insight Portfolio Group's operating expenses.

Related Party Transactions.

Our 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

Mr. Icahn, along with his affiliates (excluding Icahn Enterprises and Icahn Enterprises Holdings), makes investments in the Investment Funds. During the first quarter of 2015, affiliates of Mr. Icahn made investments aggregating $245 million in the Investment Funds. As of March 31, 2015 and December 31, 2014, the total fair market value of investments in the Investment Funds made by Mr. Icahn and his affiliates (excluding Icahn Enterprises and Icahn Enterprises Holdings) was approximately $5.2 billion and $4.8 billion, respectively, representing approximately 54% and 53%, respectively, of the Investment Funds' assets under management.

Icahn Capital LP ("Icahn Capital") pays 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); such expenses are allocated to Icahn Capital in accordance with each investor's capital accounts in the Investment Funds. Effective April 1, 2011, based on an expense-sharing arrangement, certain expenses borne by Icahn Capital are reimbursed by the Investment Funds, generally when such expenses are paid. For the three months ended March 31, 2015 and 2014, $98 million and $16 million, respectively, was allocated to the Investment Funds based on this expense-sharing arrangement.

Railcar

Agreements with ACF Industries LLC

In January 2013, ARI entered into a purchasing and engineering services agreement and license with ACF Industries LLC ("ACF"), an affiliate of Mr. Icahn. ACF is a leader in the manufacture and fabrication of specialty railcar parts and miscellaneous steel products. The agreement was unanimously approved by the independent directors of ARI’s and Icahn Enterprises' audit committee on the basis that the terms of the agreement were not materially less favorable to ARI than those that could have been obtained in a comparable transaction with an unrelated person. Under this agreement, ARI provides purchasing support and engineering services to ACF in connection with ACF’s manufacture and sale of tank railcars at its facility in Milton, Pennsylvania. Additionally, ARI has granted ACF a nonexclusive, non-assignable license to certain of ARI’s intellectual property, including certain designs, specifications, processes and manufacturing know-how required to manufacture and sell tank railcars during the term of the agreement. In August 2014, ARI and ACF amended this agreement to, among other provisions, extend the termination date to December 31, 2015 from December 31, 2014, subject to certain early termination events.

In consideration for the services and license provided by ARI to ACF in conjunction with the agreement, ACF pays ARI a royalty and, if any, a share of the net profits ("ACF Profits") earned on each railcar manufactured and sold by ACF under the agreement, in an aggregate amount equal to 30% of such ACF Profits, as calculated under the agreement. ACF Profits are net of certain of ACF’s start-up and shutdown expenses and certain maintenance capital. If no ACF Profits are realized on a railcar manufactured and sold by ACF pursuant to the agreement, ARI will still be entitled to the royalty for such railcar and will not share in any losses incurred by ACF in connection therewith. In addition, any railcar components supplied by ARI to ACF for the manufacture of these railcars are provided at fair market value.

Under the agreement, ACF had the exclusive right to manufacture and sell subject tank railcars for any new orders scheduled for delivery to customers on or before January 31, 2014. ARI has the exclusive right to any sales opportunities for such tank railcars for any new orders scheduled for delivery after that date and through termination of the agreement. ARI also has the right to assign any sales opportunity to ACF, and ACF has the right, but not the obligation, to accept such sales opportunity. Any sales opportunity accepted by ACF will not be reflected in ARI’s orders or backlog.

ARI's revenues under this agreement were $2 million and $6 million for the three months ended March 31, 2015 and 2014, respectively, and were recorded for sales of railcar components to ACF and for royalties and profits on railcars sold by ACF.

In April 2013, AEP Leasing entered into an agreement (the "ACF Agreement") with ACF whereby AEP Leasing would purchase a total of 1,050 railcars from ACF in 2013 and 2014 for an aggregate purchase price of approximately $150 million. Additionally, AEP Leasing had an option to purchase an additional 500 railcars for an aggregate purchase price of approximately $70 million. During the second quarter of 2014, AEP Leasing exercised its option to purchase an additional 296 railcars for an aggregate purchase price of $42 million.

The ACF Agreement was assumed by ARL in connection with our purchase of a 75.0% economic interest in ARL. The ACF Agreement was unanimously approved by Icahn Enterprises' audit committee consisting of independent directors, who were advised by independent counsel and an independent financial advisor on the basis that the terms were not less favorable than those terms that could have been obtained in a comparable transaction with an unaffiliated third party. Under this agreement, purchases of railcars from ACF were $9 million and $28 million for the three months ended March 31, 2015 and 2014, respectively.

In addition to the above purchases, on a contract-by-contract basis, ARL purchased $5 million of railcars from ACF for the three months ended March 31, 2015.

Insight Portfolio Group LLC

Icahn Sourcing, LLC ("Icahn Sourcing") 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 was a member of the buying group in 2012. Prior to December 31, 2012 Icahn Enterprises did not pay Icahn Sourcing any fees or other amounts with respect to the buying group arrangement.

In December 2012, Icahn Sourcing advised Icahn Enterprises that effective January 1, 2013 it would restructure its ownership and change its name to Insight Portfolio Group LLC (“Insight Portfolio Group”). In connection with the restructuring, Icahn Enterprises Holdings acquired 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 Icahn Enterprises Holdings, including Federal-Mogul, CVR, Tropicana, ARI, ARL, Viskase, PSC Metals 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 acquired equity interests in Insight Portfolio Group and also agreed to pay certain of Insight Portfolio Group's operating expenses. For each of March 31, 2015 and 2014, immaterial amounts were paid in respect to certain of the Insight Portfolio Group's operating expenses.