Subsequent Events	3 Months Ended
Mar. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events. Icahn Enterprises On May 2, 2018, the Board of Directors of the general partner of Icahn Enterprises declared a quarterly distribution in the amount of $1.75 per depositary unit. The quarterly distribution is payable in either cash or additional depositary units, at the election of each depositary unit holder and will be paid on or about June 20, 2018 to depositary unit holders of record at the close of business on May 14, 2018. Depositary unit holders have until June 8, 2018 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 distribution in cash. Depositary unit holders 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 June 15, 2018. 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. Automotive On April 10, 2018, we announced a definitive agreement to sell Federal-Mogul to Tenneco Inc. ("Tenneco") for approximately $5.4 billion, comprised of $800 million in cash and 29.5 million shares of Tenneco common stock, of which 23.8 million shares will be non-voting shares that will convert to voting shares if and when sold. There will be restrictions on how many shares of Tenneco common stock can be sold by us within the first 150 days after the closing of the sale. In addition, under this agreement, Tenneco can reduce the amount of non-voting shares of common stock by up to 7.3 million shares and increase the cash consideration proportionately at closing. The voting and non-voting shares of Tenneco common stock will have the same economic value. All of Federal-Mogul's outstanding debt at the time of closing will be assumed by Tenneco. We expect the sale to close in the second half of 2018. This agreement is subject to a $200 million termination clause. Following the close of this transaction, we will own a non-controlling interest in Tenneco which we will value using the fair value option. This transaction met all the criteria to be classified as held for sale on April 10, 2018 upon execution of the definitive agreement. Gaming On April 16, 2018, we announced a definitive agreement to sell Tropicana's real estate to Gaming and Leisure Properties, Inc. and to merge Tropicana's gaming and hotel operations into Eldorado Resorts, Inc. for aggregate consideration of approximately $1.85 billion. The transaction does not include Tropicana's Aruba assets, which will be disposed of as a condition to closing. The aggregate consideration of approximately $1.85 billion will be increased by the amount of the net proceeds received in connection with the Aruba disposition and will be further adjusted to pay corporate level taxes. We expect the sale to close in the second half of 2018, subject to receipt of required gaming approvals, termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and other customary closing conditions. This transaction met all the criteria to be classified as held for sale on April 15, 2018 upon execution of the definitive agreement.

Subsequent Events.

Icahn Enterprises

On May 2, 2018, the Board of Directors of the general partner of Icahn Enterprises declared a quarterly distribution in the amount of $1.75 per depositary unit. The quarterly distribution is payable in either cash or additional depositary units, at the election of each depositary unit holder and will be paid on or about June 20, 2018 to depositary unit holders of record at the close of business on May 14, 2018. Depositary unit holders have until June 8, 2018 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 distribution in cash. Depositary unit holders 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 June 15, 2018. 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.

Automotive

On April 10, 2018, we announced a definitive agreement to sell Federal-Mogul to Tenneco Inc. ("Tenneco") for approximately $5.4 billion, comprised of $800 million in cash and 29.5 million shares of Tenneco common stock, of which 23.8 million shares will be non-voting shares that will convert to voting shares if and when sold. There will be restrictions on how many shares of Tenneco common stock can be sold by us within the first 150 days after the closing of the sale. In addition, under this agreement, Tenneco can reduce the amount of non-voting shares of common stock by up to 7.3 million shares and increase the cash consideration proportionately at closing. The voting and non-voting shares of Tenneco common stock will have the same economic value. All of Federal-Mogul's outstanding debt at the time of closing will be assumed by Tenneco. We expect the sale to close in the second half of 2018. This agreement is subject to a $200 million termination clause. Following the close of this transaction, we will own a non-controlling interest in Tenneco which we will value using the fair value option. This transaction met all the criteria to be classified as held for sale on April 10, 2018 upon execution of the definitive agreement.

Gaming

On April 16, 2018, we announced a definitive agreement to sell Tropicana's real estate to Gaming and Leisure Properties, Inc. and to merge Tropicana's gaming and hotel operations into Eldorado Resorts, Inc. for aggregate consideration of approximately $1.85 billion. The transaction does not include Tropicana's Aruba assets, which will be disposed of as a condition to closing. The aggregate consideration of approximately $1.85 billion will be increased by the amount of the net proceeds received in connection with the Aruba disposition and will be further adjusted to pay corporate level taxes. We expect the sale to close in the second half of 2018, subject to receipt of required gaming approvals, termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and other customary closing conditions. This transaction met all the criteria to be classified as held for sale on April 15, 2018 upon execution of the definitive agreement.