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Income Taxes Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Contingency [Line Items] |  |  |  |  |
Book basis of net assets |  | $ 3,987 | $ 5,443 |  |
Book/tax basis difference |  | (88) | (1,566) |  |
Tax basis of net assets |  | 3,899 | 3,877 |  |
Current Income Tax Expense (Benefit) |  | (72) | (80) | $ (39) |
Deferred Income Tax Expense (Benefit) |  | 4 | 183 | 157 |
Income tax benefit (expense) |  | (68) | 103 | 118 |
Deferred tax assets, Property, pland and equipment |  | 341 | 144 |  |
Deferred tax asset, net operating loss |  | 1,511 | 1,348 |  |
deferred tax asset, Tax credits |  | 133 | 149 |  |
Deferred tax asset, Post-employment benefits, including pensions |  | 347 | 388 |  |
Deferred tax asset, Reoganization costs |  | 5 | 11 |  |
Deferred tax asset, Other |  | 418 | 231 |  |
Deferred Tax Assets, Gross |  | 2,755 | 2,271 |  |
Deferred Tax Assets, Valuation Allowance |  | (1,444) | (1,059) |  |
Deferred Tax Assets, Net of Valuation Allowance |  | 1,311 | 1,212 |  |
Deferred Tax Liabilities, Property, Plant and Equipment |  | (354) | (239) |  |
Deferred Tax Liabilities, Intangible Assets |  | (163) | (177) |  |
Deferred tax liability, Investment in partnerships |  | (1,376) | (1,349) |  |
Deferred tax liabilities, Investment in subsidiaries |  | (307) | (307) |  |
Deferred Tax Liabilities, Other |  | (13) | (6) |  |
Deferred Tax Liabilities, Gross |  | (2,213) | (2,078) |  |
deferred tax liabilities, net of deferred tax assets |  | (902) | (866) |  |
Deferred tax asset |  | 295 | 389 |  |
Deferred tax liability |  | 1,197 | 1,255 |  |
Changes in valuation allowance on deferred tax assets |  | 385 | 157 |  |
Cash and cash equivalents |  | 2,078 | 2,908 | 3,257 | $ 3,102
Income tax expense related to interest and penalties related to unrecognized tax benefits |  | (4) | (11) | 8 |
ARI [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Undistributed Earnings of Foreign Subsidiaries |  | 3 | 3 |  |
American Entertainment Properties Corp. [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Deferred Tax Assets, Valuation Allowance |  | (61) |  |  |
Changes in valuation allowance on deferred tax assets |  | 7 | (3) |  |
Deferred tax asst for tax loss carryforwrds and credits, subject to expiration |  | 1,500 |  |  |
Icahn Enterprises Holdings [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Book basis of net assets |  | 4,011 | 5,446 |  |
Book/tax basis difference |  | (88) | (1,545) |  |
Tax basis of net assets |  | 3,923 | 3,901 |  |
Income tax benefit (expense) |  | (68) | 103 | 118 |
Deferred tax liability |  | 1,197 | 1,255 |  |
Cash and cash equivalents |  | 2,078 | 2,908 | 3,257 | $ 3,102
Federal-Mogul [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Deferred Tax Assets, Valuation Allowance |  | (801) |  |  |
Undistributed Earnings of Foreign Subsidiaries |  | 879 |  |  |
Cash and cash equivalents |  | 194 |  |  |
Deferred tax asst for tax loss carryforwrds and credits, subject to expiration |  | 894 |  |  |
Domestic deferred tax asst for tax loss carryforwards and credits, subject to expiration |  | 495 |  |  |
Tropicana [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Deferred tax asst for tax loss carryforwrds and credits, subject to expiration |  | 156 |  |  |
Viskase [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Changes in valuation allowance on deferred tax assets |  | 55 |  |  |
Undistributed Earnings of Foreign Subsidiaries |  | 66 |  |  |
Domestic deferred tax asst for tax loss carryforwards and credits, subject to expiration |  | 93 |  |  |
United Kingdom | Federal-Mogul [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Foreign deferred tax asst for tax loss carryforwards and credits, subject to expiration |  | 132 |  |  |
Other foreign jurisdictions [Member] | Federal-Mogul [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Foreign deferred tax asst for tax loss carryforwards and credits, subject to expiration |  | 267 |  |  |
Foreign Tax Authority [Member] | Viskase [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Foreign deferred tax asst for tax loss carryforwards and credits, subject to expiration |  | 16 |  |  |
Foreign Tax Authority [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Current Income Tax Expense (Benefit) |  | (55) | (35) | (61) |
Deferred Income Tax Expense (Benefit) |  | 19 | (18) | 11 |
Domestic Tax Authority [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Current Income Tax Expense (Benefit) |  | (17) | (45) | 22 |
Deferred Income Tax Expense (Benefit) |  | (15) | 201 | 146 |
Mining Segment [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Income tax benefit (expense) | [1] | 1 |  |  |
Changes in valuation allowance on deferred tax assets |  | 394 |  |  |
Cash and cash equivalents |  | 14 |  |  |
Gaming Segment [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Income tax benefit (expense) |  | 27 | 147 | (3) |
Changes in valuation allowance on deferred tax assets |  |  | 193 |  |
Cash and cash equivalents |  | 217 | 196 |  |
Valuation allowance, deferred tax asset, change in balance |  | 196 |  |  |
Energy Segment [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Income tax benefit (expense) |  | 59 | 73 | 195 |
Cash and cash equivalents |  | 765 | 754 |  |
Energy Segment [Member] | Oklahoma | American Entertainment Properties Corp. [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Domestic tax credits |  | 26 |  |  |
Food Packaging Segment [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Income tax benefit (expense) |  | 10 | (3) | 51 |
Cash and cash equivalents |  | 37 | 39 |  |
Automotive Segment [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Income tax benefit (expense) |  | 50 | (91) | $ 180 |
Changes in valuation allowance on deferred tax assets |  | (16) | (33) |  |
Cash and cash equivalents |  | 201 | 332 |  |
Cash and cash equivalents held by foreign subsidiaries |  | 95 |  |  |
Release of deferred tax allowance |  | $ 18 | $ 287 |  |
Minimum [Member] | American Entertainment Properties Corp. [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Operating Loss Carryforwards, Expiration Dates |  | 2026 |  |  |
Minimum [Member] | Tropicana [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Operating Loss Carryforwards, Expiration Dates |  | 2028 |  |  |
Minimum [Member] | United States | Federal-Mogul [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Operating Loss Carryforwards, Expiration Dates |  | 2016 |  |  |
Minimum [Member] | United States | Viskase [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Operating Loss Carryforwards, Expiration Dates |  | 2024 |  |  |
Maximum [Member] | American Entertainment Properties Corp. [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Operating Loss Carryforwards, Expiration Dates |  | 2035 |  |  |
Maximum [Member] | United States | Federal-Mogul [Member] |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Operating Loss Carryforwards, Expiration Dates |  | 2035 |  |  |
[1] | We consolidated Ferrous Resources effective June 1, 2015.

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