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Commitments and Contingencies Commitments and Contingencies (Details) (USD $) | 0 Months Ended | 3 Months Ended |  |  |  |  | 0 Months Ended | 3 Months Ended |  | 3 Months Ended | 12 Months Ended |  |  | 3 Months Ended |  | 3 Months Ended | 12 Months Ended
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May 02, 2013 Principal Owners and Affiliates [Member] | Mar. 31, 2013 Principal Owners and Affiliates [Member] | Mar. 31, 2013 ACF [Member] | Dec. 31, 2012 ACF [Member] | Mar. 31, 2013 Starfire Holding Corporation [Member] | Mar. 31, 2013 Automotive Segment [Member] | Dec. 31, 2012 Automotive Segment [Member] | Aug. 12, 2010 Tropicana [Member] Gaming Segment [Member] | Mar. 31, 2013 PSC Metals [Member] Metals Segment [Member] | Dec. 31, 2012 PSC Metals [Member] Metals Segment [Member] | Mar. 31, 2013 PSC Metals [Member] Metals Segment [Member] Cleveland OH Scrap Processing Facility [Member] | Dec. 31, 2011 PSC Metals [Member] Metals Segment [Member] Cleveland OH Scrap Processing Facility [Member] | Mar. 31, 2013 WPH [Member] Home Fashion Segment [Member] | Dec. 31, 2012 WPH [Member] Home Fashion Segment [Member] | Mar. 31, 2013 Federal-Mogul [Member] Automotive Segment [Member] | Dec. 31, 2012 Federal-Mogul [Member] Automotive Segment [Member] | Mar. 31, 2013 Icahn Enterprises G.P. [Member] Principal Owners and Affiliates [Member] | Dec. 31, 2011 CRNF [Member] Energy Segment [Member] | Dec. 31, 2010 CRNF [Member] Energy Segment [Member] | Dec. 31, 2009 CRNF [Member] Energy Segment [Member] | Dec. 31, 2008 CRNF [Member] Energy Segment [Member]
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued environmental liabilities |  |  |  |  |  | $ 14,000,000 | $ 15,000,000 |  | $ 29,000,000 | $ 29,000,000 |  |  | $ 1,000,000 | $ 1,000,000 |  |  |  |  |  |  |
Possible material additional losses, above and beyond best estimate of required remediation costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 42,000,000 |  |  |  |  |  |
Asset Retirement Obligation |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 29,000,000 | 29,000,000 |  |  |  |  |
Compensatory damages sought |  |  |  |  |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Average increase in annual property tax expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,000,000 | 12,000,000 | 11,000,000 | 11,000,000
Negotiated settlement to resolve Port Refinery environmental matter |  |  |  |  |  |  |  |  | 225,000 |  |  |  |  |  |  |  |  |  |  | 11,000,000 |
Number of scrap processing facilities requiring refrigerant extraction services |  |  |  |  |  |  |  |  |  |  | 11 |  |  |  |  |  |  |  |  |  |
Number of years refrigerant extraction services must be offered at scrap processing facilities |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |
Costs associated with required injunctive relief, low estimate |  |  |  |  |  |  |  |  |  |  | 800,000 |  |  |  |  |  |  |  |  |  |
Costs associated with required injunctive relief, high estimate |  |  |  |  |  |  |  |  |  |  | 1,700,000 |  |  |  |  |  |  |  |  |  |
Civil penalty assessed and paid |  |  |  |  |  |  |  |  |  |  |  | 199,000 |  |  |  |  |  |  |  |  |
Affiliate ownership in parent company general partner |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |
Affiliate ownership interest | 90.60% | 90.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan, Funded Status of Plan |  |  | 127,000,000 | 130,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership Percentage by Mr. Icahn |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary Indemnity Agreement, Pension Funding Contingencies As A Result of Being In The Controlled Group, Distribution Limitation, Net Worth Floor |  |  |  |  | $ 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Best estimate of the reasonably possible loss exposure in excess of the amount accrued for environmental loss contingencies at an individual site. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 96-1 -Paragraph 163 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 10 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859 + Details
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