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Commitments and Contingencies Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Loss Contingencies [Line Items] |  |  |
Affiliate ownership interest | 98.01% |  |
Funded status of related party pension plan | $ (80) |  |
Energy Segment |  |  |
Loss Contingencies [Line Items] |  |  |
Environmental loss contingency accrual | 8 | $ 4 |
Price of RINs | 60 | 249 | $ 206
Biofuel blending obligation | 4 | 28 |
Metals Segment |  |  |
Loss Contingencies [Line Items] |  |  |
Environmental loss contingency accrual | 27 | 28 |
Automotive Segment |  |  |
Loss Contingencies [Line Items] |  |  |
Environmental loss contingency accrual |  | 16 |
Federal-Mogul |  |  |
Loss Contingencies [Line Items] |  |  |
Contribution to subsidiary | 56 |  |
Federal-Mogul Products, Inc. |  |  |
Loss Contingencies [Line Items] |  |  |
Payment for litigation settlement agreement | $ 3 |  |
Mr. Icahn and affiliates |  |  |
Loss Contingencies [Line Items] |  |  |
Affiliate ownership interest | 91.70% |  |
Mr. Icahn and affiliates | Icahn Enterprises G.P. |  |  |
Loss Contingencies [Line Items] |  |  |
Affiliate ownership in parent company general partner | 100.00% |  |
Starfire Holding Corporation |  |  |
Loss Contingencies [Line Items] |  |  |
Ownership percentage by principal owner | 99.60% |  |
Pension funding indemnity agreement with subsidiary | $ 250 |  |
Accrued expenses and other liabilities |  |  |
Loss Contingencies [Line Items] |  |  |
Environmental loss contingency accrual | $ 37 | $ 34 |

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