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Presentation (Details) $ / shares in Units, shares in Millions |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
May 26, 2016 USD ($) | Apr. 01, 2016 USD ($) shares | Feb. 26, 2016 USD ($) | Feb. 04, 2016 USD ($) | Dec. 31, 2016 USD ($) $ / shares | Dec. 31, 2015 USD ($) $ / shares | Dec. 31, 2014 USD ($) | Dec. 19, 2016 USD ($)
Entity Information [Line Items] |  |  |  |  |  |  |  |
Impairment |  |  |  |  | $ 709,000,000 | $ 788,000,000 | $ 135,000,000 |
Assets held for sale |  |  |  |  | 1,366,000,000 | 154,000,000 |  |
Liabilities held for sale |  |  |  |  | $ 1,779,000,000 | 5,000,000 |  |
Mr. Icahn and affiliates |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
Affiliate ownership interest in Icahn Enterprises |  |  |  |  | 89.80% |  |  |
Icahn Enterprises G.P. |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
General partner ownership percentage in Icahn Enterprises |  |  |  |  | 1.00% |  |  |
General partner ownership interest in Icahn Enterprises Holdings |  |  |  |  | 1.00% |  |  |
Aggregate general partner ownership interest of parent and operating subsidiary |  |  |  |  | 1.99% |  |  |
Icahn Enterprises Holdings |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  |  |  | 99.00% |  |  |
Impairment |  |  |  |  | $ 709,000,000 | 788,000,000 | 135,000,000 |
Assets held for sale |  |  |  |  | 1,366,000,000 | 154,000,000 |  |
Liabilities held for sale |  |  |  |  | 1,779,000,000 | 5,000,000 |  |
Automotive Segment |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
Impairment |  |  |  |  | 18,000,000 | 344,000,000 | 24,000,000 |
Automotive Segment | Pep Boys |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
Total value of consideration transferred to acquire business |  |  |  | $ 1,200,000,000 |  |  |  |
Fair value of equity interest in acquired business prior to acquiring a controlling interest |  |  |  | 121,000,000 |  |  |  |
Value assigned to net tangible assets acquired |  |  |  | 993,000,000 |  |  |  |
Value assigned to property, plant and equipment |  |  |  | 998,000,000 |  |  |  |
Value assigned to inventory |  |  |  | 659,000,000 |  |  |  |
Value assigned to other tangible net liabilities |  |  |  | 664,000,000 |  |  |  |
Value assigned to goodwill and other intangible assets acquired |  |  |  | 210,000,000 |  |  |  |
Value assigned to unfavorable lease intangible liability acquired |  |  |  | $ 59,000,000 |  |  |  |
Revenue of acquiree since acquisition date |  |  |  |  | 1,700,000,000 |  |  |
Income (loss) of acquiree attributable to parent since acquisition date |  |  |  |  | (8,000,000) |  |  |
Pro forma revenue |  |  |  |  | 16,500,000,000 | 17,400,000,000 |  |
Pro forma net income (loss) |  |  |  |  | (2,300,000,000) | (2,100,000,000) |  |
Pro forma net income (loss) attributable to parent as if the acquisition had been completed at the beginning of the earliest pro forma information presented. |  |  |  |  | $ (1,200,000,000) | $ (1,200,000,000) |  |
Pro forma basic earnings per share | $ / shares |  |  |  |  | $ (8.36) | $ (9.44) |  |
Pro forma diluted earnings per share | $ / shares |  |  |  |  | $ (8.36) | $ (9.44) |  |
Automotive Segment | Other acquisition |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
Total value of consideration transferred to acquire business | $ 25,000,000 |  |  |  |  |  |  |
Value assigned to net tangible assets acquired | $ 25,000,000 |  |  |  |  |  |  |
Energy Segment |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
Impairment |  |  |  |  | $ 574,000,000 | $ 253,000,000 | 103,000,000 |
Energy Segment | CVR Nitrogen |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
Total value of consideration transferred to acquire business |  | $ 440,000,000 |  |  |  |  |  |
Value assigned to net tangible assets acquired |  | $ 440,000,000 |  |  |  |  |  |
Subsidiary units issued to acquire business | shares |  | 40.2 |  |  |  |  |  |
Value of equity issued to acquire business |  | $ 336,000,000 |  |  |  |  |  |
Cash paid to acquire business |  | 99,000,000 |  |  |  |  |  |
Faiv value of liabilities assumed to acquire business |  | 368,000,000 |  |  |  |  |  |
Debt face amount |  | 320,000,000 |  |  |  |  |  |
Intercompany debt, face amount |  | $ 320,000,000 |  |  |  |  |  |
Gaming Segment |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
Impairment |  |  |  |  | $ 106,000,000 | 0 | 0 |
Gaming Segment | TER |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  |  |  | 100.00% |  |  |
Fair value of equity interest in acquired business prior to acquiring a controlling interest |  |  | $ 126,000,000 |  |  |  |  |
Gain on remeasurement of equity interest in acquired business to acquisition date fair value |  |  | 16,000,000 |  |  |  |  |
Value assigned to net tangible assets acquired |  |  | 109,000,000 |  |  |  |  |
Value assigned to goodwill and other intangible assets acquired |  |  | 17,000,000 |  |  |  |  |
Face value of pre-petition debt |  |  | $ 286,000,000 |  |  |  |  |
Railcar Segment |  |  |  |  |  |  |  |
Entity Information [Line Items] |  |  |  |  |  |  |  |
Impairment |  |  |  |  | $ 0 | $ 0 | $ 0 |
Value of business to be disposed of |  |  |  |  |  |  |  | $ 2,800,000,000
Estimated number of railcars to be disposed of (number of railcars) |  |  |  |  |  |  |  | 29,000
Estimated number of additional railcars with option to sell (number of railcars) |  |  |  |  |  |  |  | 4,800
Estimated value of additional railcars with option to sell |  |  |  |  |  |  |  | $ 586,000,000
Cash and cash equivalents held for sale |  |  |  |  | 113,000,000 |  |  |
Property, plant and equipment held for sale |  |  |  |  | 1,197,000,000 |  |  |
Other assets held for sale |  |  |  |  | 41,000,000 |  |  |
Assets held for sale |  |  |  |  | 1,351,000,000 |  |  |
Accounts payable, accrued expenses and other liabilities held for sale |  |  |  |  | 27,000,000 |  |  |
Debt held for sale |  |  |  |  | 1,746,000,000 |  |  |
Liabilities held for sale |  |  |  |  | $ 1,773,000,000 |  |  |

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