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Commitments and Contingencies Commitments and Contingencies (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Oct. 25, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Loss Contingencies [Line Items] |  |  |  |
Funded status of the plan |  | $ (613) | $ (589) |
2017 |  | 245 |  |
2018 |  | 225 |  |
2019 |  | 183 |  |
2020 |  | 155 |  |
2021 |  | 130 |  |
Thereafter |  | 356 |  |
Future minimum payments due on operating leases |  | 1,294 |  |
Rent expense |  | 237 | 145 | $ 112
Automotive Segment |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Environmental loss contingency accrual |  | 16 | 14 |
Estimate of additional remediation costs |  | 41 |  |
Asset retirement obligations |  | 21 | 16 |
Railcar Segment |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Litigation claim gain amount | $ 25 |  |  |
Litigation counterclaim amount | $ 10 |  |  |
Railcar loss contingency accrual |  | 16 |  |
Metals Segment |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Environmental loss contingency accrual |  | 28 | $ 29 |
ARL | Railcar Segment |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Future minimum payments due on operating leases |  | $ 17 |  |
Mr. Icahn and affiliates |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Affiliate ownership interest |  | 89.80% |  |
Mr. Icahn and affiliates | Icahn Enterprises G.P. |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Affiliate ownership in parent company general partner |  | 100.00% |  |
Starfire Holding Corporation [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Ownership percentage by principal owner |  | 99.40% |  |
Pension funding indemnity agreement with subsidiary |  | $ 250 |  |

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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64852052&loc=d3e1703-114919 + Details
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