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Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Cumulative effect adjustment from adoption of accounting principle | $ (20) | $ (47) |
Inventories, net | 3,497 |  | $ 3,261
Debt | 11,208 |  | 11,185
Fair value of long-term debt | 11,500 |  | 11,500
Restricted cash | 643 |  | 786
Accrued expenses and other liabilities | 1,991 |  | 1,746
Deferred tax liability | 962 |  | 924
Net sales | 4,493 | 4,319 |
Cost of goods sold | 3,856 | 3,688 |
Accounts receivable, net | 1,914 |  | 1,805
Total assets | 30,498 |  | 31,801
Total liabilities | 18,743 |  | 20,433
Restricted cash |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Restricted cash | 351 |  | 594
Automotive Segment |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Inventories, net | 2,776 |  | 2,601
Debt | 3,499 |  | 3,470
Restricted cash | 5 |  | 4
Gross amount of transferred receivables under factoring arrangements | 674 |  | 641
Gross amount of transferred receivables under factoring arrangements qualifying as sales | 668 |  | 635
Proceeds from transferred receivables under factoring arrangements qualifying as sales | 491 | 474 |
Expenses associated with transferred receivables under factoring arrangements | 5 | 4 |
Deferred Revenue | 30 |  | 29
Deferred Revenue, Revenue Recognized | 4 |  |
Deferred Revenue, Noncurrent | 15 |  |
Net sales | 2,614 | 2,477 |
Cost of goods sold | 2,127 | 1,992 |
Accounts receivable, net | 1,511 |  | 1,406
Total assets | 11,031 |  | 10,709
Total liabilities | 7,446 |  | 7,315
Energy Segment |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Inventories, net | 424 |  | 385
Debt | 1,167 |  | 1,166
Restricted cash | 0 |  | 0
Deferred Revenue | 24 |  | 34
Deferred Revenue, Revenue Recognized | 12 |  |
Deferred Revenue, Noncurrent | 13 |  |
Net sales | 1,537 | 1,507 |
Cost of goods sold | 1,430 | 1,419 |
Accounts receivable, net | 179 |  | 178
Total assets | 4,705 |  | 4,700
Total liabilities | 2,252 |  | 2,291
Railcar Segment |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Inventories, net | 73 |  | 54
Debt | 539 |  | 546
Restricted cash | 19 |  | 19
Revenue, Remaining Performance Obligation | 279 |  |
Net sales | 64 | 61 |
Cost of goods sold | 58 | 55 |
Accounts receivable, net | 33 |  | 44
Total assets | 1,487 |  | 1,487
Total liabilities | 815 |  | 808
Revenue, current portion of remaining performance obligation | 159 |  |
Revenue, non-current portion of remaining performance obligation | 120 |  |
Icahn Enterprises Holdings |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Cumulative effect adjustment from adoption of accounting principle | (20) | (47) |
Inventories, net | $ 3,497 |  | 3,261
Percentage of equity ownership in operating subsidiary | 99.00% |  |
Debt | $ 11,213 |  | 11,190
Restricted cash | 643 |  | 786
Accrued expenses and other liabilities | 1,991 |  | 1,746
Deferred tax liability | 962 |  | 924
Net sales | 4,493 | 4,319 |
Cost of goods sold | 3,856 | 3,688 |
Accounts receivable, net | 1,914 |  | 1,805
Total assets | 30,530 |  | 31,833
Total liabilities | 18,748 |  | 20,438
Cash and cash equivalents | Icahn Enterprises Holdings |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Assets of VIE's | 168 |  | 223
Cash held at consolidated affiliated partnerships and restricted cash | Icahn Enterprises Holdings |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Assets of VIE's | 587 |  | 734
Investments | Icahn Enterprises Holdings |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Assets of VIE's | 7,601 |  | 9,615
Due from brokers | Icahn Enterprises Holdings |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Assets of VIE's | 1,236 |  | 506
Property, plant and equipment, net | Icahn Enterprises Holdings |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Assets of VIE's | 3,146 |  | 3,191
Inventories, net | Icahn Enterprises Holdings |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Assets of VIE's | 424 |  | 385
Intangible assets, net | Icahn Enterprises Holdings |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Assets of VIE's | 293 |  | 298
Other assets | Icahn Enterprises Holdings |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Assets of VIE's | 155 |  | 48
Accounts payable, accrued expenses and other liabilities | Icahn Enterprises Holdings |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Liabilities of VIE's | 1,439 |  | 1,816
Securities sold, not yet purchased, at fair value | Icahn Enterprises Holdings |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Liabilities of VIE's | 299 |  | 1,023
Due to brokers | Icahn Enterprises Holdings |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Liabilities of VIE's | 38 |  | 1,057
Debt | Icahn Enterprises Holdings |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Liabilities of VIE's | 1,167 |  | $ 1,166
Cost of Sales [Member] |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Prior Period Reclassification Adjustment |  | 4 |
Selling, General and Administrative Expenses [Member] |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Prior Period Reclassification Adjustment |  | 6 |
Other Income [Member] |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Prior Period Reclassification Adjustment |  | (10) |
Net cash provided by operating activities [Member] |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Prior Period Reclassification Adjustment |  | $ (203) |
Difference between Revenue Guidance in Effect before and after Topic 606 |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Total assets | 6 |  |
Difference between Revenue Guidance in Effect before and after Topic 606 | Automotive Segment |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Net sales | 18 |  |
Cost of goods sold | 17 |  |
Accounts receivable, net | 21 |  |
Total liabilities | (3) |  |
Difference between Revenue Guidance in Effect before and after Topic 606 | Energy Segment |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Accrued expenses and other liabilities | (21) |  |
Product returns | Difference between Revenue Guidance in Effect before and after Topic 606 | Automotive Segment |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Inventories, net | 26 |  |
Accrued expenses and other liabilities | (26) |  |
Extended warranties | Difference between Revenue Guidance in Effect before and after Topic 606 | Automotive Segment |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |
Accrued expenses and other liabilities | (30) |  |
Deferred tax liability | $ 7 |  |

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