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Income Taxes Narrative (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Income Tax Contingency [Line Items] |  |  |  |
Book basis of net assets | $ 4,669 | $ 3,755 |  |
Book/tax basis difference | (1,840) | (1,553) |  |
Tax basis of net assets | 2,829 | 2,202 |  |
Current Income Tax Expense (Benefit) | (157) | (46) | (37) |
Deferred Income Tax Expense (Benefit) | 238 | 12 | 28 |
Income tax benefit (expense) | 81 | (34) | (9) |
Deferred tax assets, Property, pland and equipment | 146 | 180 |  |
Deferred tax asset, net operating loss | 1,163 | 873 |  |
deferred tax asset, Tax credits | 134 | 120 |  |
Deferred tax asset, Post-employment benefits, including pensions | 441 | 412 |  |
Deferred tax asset, Reoganization costs | 51 | 78 |  |
Deferred tax asset, Other | 311 | 167 |  |
Deferred Tax Assets, Gross | 2,246 | 1,830 |  |
Deferred Tax Assets, Valuation Allowance | (1,550) | (1,403) |  |
Deferred Tax Assets, Net of Valuation Allowance | 696 | 427 |  |
Deferred Tax Liabilities, Property, Plant and Equipment | (644) | (115) |  |
Deferred Tax Liabilities, Intangible Assets | (377) | (263) |  |
Deferred tax liability, Investment in partnerships | (303) | (103) |  |
Deferred tax liabilities, Investment in subsidiaries | (307) | (366) |  |
Deferred Tax Liabilities, Other | (27) | (14) |  |
Deferred Tax Liabilities, Gross | (1,658) | (861) |  |
deferred tax liabilities, net of deferred tax assets | (962) | (434) |  |
Deferred tax asset | 373 | 122 |  |
Deferred tax liability | 1,335 | 556 |  |
Changes in valuation allowance on deferred tax assets | 147 | 1 |  |
Cash and cash equivalents | 3,071 | 2,278 | 2,963 | 2,256
WPI [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Changes in valuation allowance on deferred tax assets | 31 | 23 |  |
ARI [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Undistributed Earnings of Foreign Subsidiaries | 2 | 2 |  |
Deferred tax asst for tax loss carryforwrds and credits, subject to expiration | 6 |  |  |
American Entertainment Properties Corp. [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Deferred Tax Assets, Valuation Allowance | 48 |  |  |
Changes in valuation allowance on deferred tax assets | 221 |  |  |
Deferred tax asst for tax loss carryforwrds and credits, subject to expiration | 727 |  |  |
Icahn Enterprises Holdings [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Book basis of net assets | 4,691 | 3,776 |  |
Book/tax basis difference | (1,840) | (1,553) |  |
Tax basis of net assets | 2,851 | 2,223 |  |
Income tax benefit (expense) | 81 | (34) | (9) |
Deferred tax liability | 1,335 | 556 |  |
Cash and cash equivalents | 3,071 | 2,278 | 2,963 | 2,256
Federal-Mogul [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Undistributed Earnings of Foreign Subsidiaries | 719 |  |  |
Deferred tax asst for tax loss carryforwrds and credits, subject to expiration | 903 |  |  |
Domestic deferred tax asst for tax loss carryforwards and credits, subject to expiration | 507 |  |  |
Tropicana [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Changes in valuation allowance on deferred tax assets |  | 47 |  |
Deferred tax asst for tax loss carryforwrds and credits, subject to expiration | 174 |  |  |
Atlantic Coast [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Deferred tax asst for tax loss carryforwrds and credits, subject to expiration | 11 |  |  |
Viskase [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Changes in valuation allowance on deferred tax assets |  | 30 |  |
Undistributed Earnings of Foreign Subsidiaries | 62 |  |  |
Domestic deferred tax asst for tax loss carryforwards and credits, subject to expiration | 107 |  |  |
United States | Viskase [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Deferred Tax Assets, Valuation Allowance | 55 |  |  |
United Kingdom | Federal-Mogul [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Foreign deferred tax asst for tax loss carryforwards and credits, subject to expiration | 199 |  |  |
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 | 197 |  |  |
Foreign Tax Authority [Member] | Viskase [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Foreign deferred tax asst for tax loss carryforwards and credits, subject to expiration | 927 |  |  |
Portion of deferred tax asset from operating loss carryforwards with defined expiration date | 325 |  |  |
Foreign Tax Authority [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Current Income Tax Expense (Benefit) | (53) | (45) | (54) |
Deferred Income Tax Expense (Benefit) | 47 | 8 | 43 |
Domestic Tax Authority [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Current Income Tax Expense (Benefit) | (104) | (1) | 17 |
Deferred Income Tax Expense (Benefit) | 191 | 4 | (15) |
Other Segments [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Changes in valuation allowance on deferred tax assets | 221 |  |  |
Federal-Mogul [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Changes in valuation allowance on deferred tax assets | 399 |  |  |
Energy Segment [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Income tax benefit (expense) | 182 |  |  |
Cash and cash equivalents | 896 |  |  |
Energy Segment [Member] | Kansas | American Entertainment Properties Corp. [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Domestic tax credits | 10 |  |  |
Energy Segment [Member] | Oklahoma | American Entertainment Properties Corp. [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Domestic tax credits | 4 |  |  |
Automotive Segment [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Income tax benefit (expense) | (29) | (17) | (12) |
Cash and cash equivalents | 467 | 953 |  |
Cash and cash equivalents held by foreign subsidiaries | $ 219 |  |  |
Minimum [Member] | ARI [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Operating Loss Carryforwards, Expiration Dates | 2014 |  |  |
Minimum [Member] | American Entertainment Properties Corp. [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Operating Loss Carryforwards, Expiration Dates | 2025 |  |  |
Minimum [Member] | Tropicana [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Operating Loss Carryforwards, Expiration Dates | 2028 |  |  |
Minimum [Member] | Atlantic Coast [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Operating Loss Carryforwards, Expiration Dates | 2025 |  |  |
Minimum [Member] | United States | Federal-Mogul [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Operating Loss Carryforwards, Expiration Dates | 2013 |  |  |
Minimum [Member] | United States | Viskase [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Operating Loss Carryforwards, Expiration Dates | 2024 |  |  |
Minimum [Member] | Foreign Tax Authority [Member] | Viskase [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Operating Loss Carryforwards, Expiration Dates | 2015 |  |  |
Maximum [Member] | ARI [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Operating Loss Carryforwards, Expiration Dates | 2031 |  |  |
Maximum [Member] | American Entertainment Properties Corp. [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Operating Loss Carryforwards, Expiration Dates | 2031 |  |  |
Maximum [Member] | United States | Federal-Mogul [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Operating Loss Carryforwards, Expiration Dates | 2032 |  |  |

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