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Commitments and Contingencies (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
ACF |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Defined benefit plan underfunded amount | $ 84 |  | $ 84 |  |
Starfire Holding Corporation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Ownership percentage by Mr. Icahn | 99.60% |  | 99.60% |  |
Pension funding indemnity agreement with subsidiary | $ 250 |  | $ 250 |  |
Energy Segment |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
RINs costs | 16 | $ 21 | $ 35 | $ 33 |
Icahn Enterprises G.P. | Mr. Icahn and affiliates |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Affiliate ownership in parent company general partner |  |  | 100.00% |  |
Accrued expenses and other liabilities |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Accrued environmental liabilities | $ 38 |  | $ 38 |  | $ 34
Icahn Enterprises Holdings | Mr. Icahn and affiliates |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Affiliate ownership interest |  |  | 92.00% |  |

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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 + Details
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