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Condensed Balance Sheets By Reporting Segment (Details) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017 | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
ASSETS |  |  |  |
Cash and cash equivalents | $ 875 | $ 1,264 |  |
Cash held at consolidated affiliated partnerships and restricted cash | 350 | 766 |  |
Investments | 8,706 | 10,038 |  |
Accounts receivable, net | 682 | 612 |  |
Inventories, net | 1,951 | 1,805 |  |
Property, plant and equipment, net | 6,253 | 6,364 |  |
Goodwill and intangible assets, net | 857 | 878 |  |
Assets held for sale | 8,869 | 8,790 |  |
Other assets | 1,647 | 1,284 |  |
Total assets | 30,190 | 31,801 |  |
LIABILITIES AND EQUITY |  |  |  |
Accounts payable, accrued expenses and other liabilities | 3,349 | 4,233 |  |
Securities sold, not yet purchased, at fair value | 368 | 1,023 |  |
Due to brokers | 0 | 1,057 |  |
Liabilities held for sale | 6,145 | 6,202 |  |
Debt | 7,880 | 7,918 |  |
Total liabilities | 17,742 | 20,433 |  |
Equity attributable to Icahn Enterprises | 5,416 | 5,106 |  |
Equity attributable to non-controlling interests | 7,032 | 6,262 |  |
Total equity | 12,448 | 11,368 | $ 10,530 | $ 8,017
Total liabilities and equity | 30,190 | 31,801 |  |
Investment Segment |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 6 | 17 |  |
Cash held at consolidated affiliated partnerships and restricted cash | 316 | 734 |  |
Investments | 8,132 | 9,532 |  |
Accounts receivable, net | 0 | 0 |  |
Inventories, net | 0 | 0 |  |
Property, plant and equipment, net | 0 | 0 |  |
Goodwill and intangible assets, net | 0 | 0 |  |
Assets held for sale | 0 | 0 |  |
Other assets | 890 | 516 |  |
Total assets | 9,344 | 10,799 |  |
LIABILITIES AND EQUITY |  |  |  |
Accounts payable, accrued expenses and other liabilities | 497 | 1,302 |  |
Securities sold, not yet purchased, at fair value | 368 | 1,023 |  |
Due to brokers | 0 | 1,057 |  |
Liabilities held for sale | 0 | 0 |  |
Debt | 0 | 0 |  |
Total liabilities | 865 | 3,382 |  |
Equity attributable to Icahn Enterprises | 3,354 | 3,052 |  |
Equity attributable to non-controlling interests | 5,125 | 4,365 |  |
Total equity | 8,479 | 7,417 |  |
Total liabilities and equity | 9,344 | 10,799 |  |
Automotive Segment |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 53 | 52 |  |
Cash held at consolidated affiliated partnerships and restricted cash | 0 | 0 |  |
Investments | 10 | 0 |  |
Accounts receivable, net | 266 | 224 |  |
Inventories, net | 1,218 | 1,145 |  |
Property, plant and equipment, net | 951 | 958 |  |
Goodwill and intangible assets, net | 500 | 505 |  |
Assets held for sale | 0 | 0 |  |
Other assets | 144 | 127 |  |
Total assets | 3,142 | 3,011 |  |
LIABILITIES AND EQUITY |  |  |  |
Accounts payable, accrued expenses and other liabilities | 941 | 944 |  |
Securities sold, not yet purchased, at fair value | 0 | 0 |  |
Due to brokers | 0 | 0 |  |
Liabilities held for sale | 0 | 0 |  |
Debt | 324 | 340 |  |
Total liabilities | 1,265 | 1,284 |  |
Equity attributable to Icahn Enterprises | 1,877 | 1,727 |  |
Equity attributable to non-controlling interests | 0 | 0 |  |
Total equity | 1,877 | 1,727 |  |
Total liabilities and equity | 3,142 | 3,011 |  |
Energy Segment |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 534 | 482 |  |
Cash held at consolidated affiliated partnerships and restricted cash | 0 | 0 |  |
Investments | 83 | 83 |  |
Accounts receivable, net | 190 | 178 |  |
Inventories, net | 433 | 385 |  |
Property, plant and equipment, net | 3,113 | 3,213 |  |
Goodwill and intangible assets, net | 288 | 298 |  |
Assets held for sale | 6 | 0 |  |
Other assets | 69 | 61 |  |
Total assets | 4,716 | 4,700 |  |
LIABILITIES AND EQUITY |  |  |  |
Accounts payable, accrued expenses and other liabilities | 1,106 | 1,125 |  |
Securities sold, not yet purchased, at fair value | 0 | 0 |  |
Due to brokers | 0 | 0 |  |
Liabilities held for sale | 0 | 0 |  |
Debt | 1,167 | 1,166 |  |
Total liabilities | 2,273 | 2,291 |  |
Equity attributable to Icahn Enterprises | 1,139 | 1,098 |  |
Equity attributable to non-controlling interests | 1,304 | 1,311 |  |
Total equity | 2,443 | 2,409 |  |
Total liabilities and equity | 4,716 | 4,700 |  |
Railcar Segment |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 104 | 100 |  |
Cash held at consolidated affiliated partnerships and restricted cash | 19 | 19 |  |
Investments | 21 | 23 |  |
Accounts receivable, net | 38 | 44 |  |
Inventories, net | 78 | 54 |  |
Property, plant and equipment, net | 1,190 | 1,199 |  |
Goodwill and intangible assets, net | 7 | 7 |  |
Assets held for sale | 0 | 14 |  |
Other assets | 24 | 27 |  |
Total assets | 1,481 | 1,487 |  |
LIABILITIES AND EQUITY |  |  |  |
Accounts payable, accrued expenses and other liabilities | 277 | 262 |  |
Securities sold, not yet purchased, at fair value | 0 | 0 |  |
Due to brokers | 0 | 0 |  |
Liabilities held for sale | 0 | 0 |  |
Debt | 533 | 546 |  |
Total liabilities | 810 | 808 |  |
Equity attributable to Icahn Enterprises | 418 | 428 |  |
Equity attributable to non-controlling interests | 253 | 251 |  |
Total equity | 671 | 679 |  |
Total liabilities and equity | 1,481 | 1,487 |  |
Metals Segment |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 11 | 24 |  |
Cash held at consolidated affiliated partnerships and restricted cash | 5 | 5 |  |
Investments | 0 | 0 |  |
Accounts receivable, net | 67 | 40 |  |
Inventories, net | 33 | 33 |  |
Property, plant and equipment, net | 105 | 110 |  |
Goodwill and intangible assets, net | 3 | 3 |  |
Assets held for sale | 1 | 2 |  |
Other assets | 8 | 9 |  |
Total assets | 233 | 226 |  |
LIABILITIES AND EQUITY |  |  |  |
Accounts payable, accrued expenses and other liabilities | 55 | 43 |  |
Securities sold, not yet purchased, at fair value | 0 | 0 |  |
Due to brokers | 0 | 0 |  |
Liabilities held for sale | 0 | 0 |  |
Debt | 1 | 1 |  |
Total liabilities | 56 | 44 |  |
Equity attributable to Icahn Enterprises | 177 | 182 |  |
Equity attributable to non-controlling interests | 0 | 0 |  |
Total equity | 177 | 182 |  |
Total liabilities and equity | 233 | 226 |  |
Mining Segment |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 11 | 15 |  |
Cash held at consolidated affiliated partnerships and restricted cash | 0 | 0 |  |
Investments | 0 | 0 |  |
Accounts receivable, net | 6 | 10 |  |
Inventories, net | 27 | 30 |  |
Property, plant and equipment, net | 208 | 188 |  |
Goodwill and intangible assets, net | 0 | 0 |  |
Assets held for sale | 0 | 0 |  |
Other assets | 22 | 22 |  |
Total assets | 274 | 265 |  |
LIABILITIES AND EQUITY |  |  |  |
Accounts payable, accrued expenses and other liabilities | 43 | 45 |  |
Securities sold, not yet purchased, at fair value | 0 | 0 |  |
Due to brokers | 0 | 0 |  |
Liabilities held for sale | 0 | 0 |  |
Debt | 54 | 58 |  |
Total liabilities | 97 | 103 |  |
Equity attributable to Icahn Enterprises | 154 | 138 |  |
Equity attributable to non-controlling interests | 23 | 24 |  |
Total equity | 177 | 162 |  |
Total liabilities and equity | 274 | 265 |  |
Food Packaging Segment |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 46 | 16 |  |
Cash held at consolidated affiliated partnerships and restricted cash | 1 | 2 |  |
Investments | 0 | 0 |  |
Accounts receivable, net | 80 | 78 |  |
Inventories, net | 99 | 92 |  |
Property, plant and equipment, net | 167 | 170 |  |
Goodwill and intangible assets, net | 35 | 36 |  |
Assets held for sale | 0 | 0 |  |
Other assets | 88 | 93 |  |
Total assets | 516 | 487 |  |
LIABILITIES AND EQUITY |  |  |  |
Accounts payable, accrued expenses and other liabilities | 158 | 172 |  |
Securities sold, not yet purchased, at fair value | 0 | 0 |  |
Due to brokers | 0 | 0 |  |
Liabilities held for sale | 0 | 0 |  |
Debt | 270 | 273 |  |
Total liabilities | 428 | 445 |  |
Equity attributable to Icahn Enterprises | 66 | 28 |  |
Equity attributable to non-controlling interests | 22 | 14 |  |
Total equity | 88 | 42 |  |
Total liabilities and equity | 516 | 487 |  |
Real Estate Segment |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 30 | 32 |  |
Cash held at consolidated affiliated partnerships and restricted cash | 2 | 2 |  |
Investments | 16 | 16 |  |
Accounts receivable, net | 3 | 3 |  |
Inventories, net | 0 | 0 |  |
Property, plant and equipment, net | 448 | 454 |  |
Goodwill and intangible assets, net | 24 | 29 |  |
Assets held for sale |  | 0 |  |
Other assets | 394 | 395 |  |
Total assets | 917 | 931 |  |
LIABILITIES AND EQUITY |  |  |  |
Accounts payable, accrued expenses and other liabilities | 54 | 63 |  |
Securities sold, not yet purchased, at fair value | 0 | 0 |  |
Due to brokers | 0 | 0 |  |
Liabilities held for sale | 0 | 0 |  |
Debt | 20 | 22 |  |
Total liabilities | 74 | 85 |  |
Equity attributable to Icahn Enterprises | 843 | 846 |  |
Equity attributable to non-controlling interests | 0 | 0 |  |
Total equity | 843 | 846 |  |
Total liabilities and equity | 917 | 931 |  |
Home Fashion Segment |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 1 | 0 |  |
Cash held at consolidated affiliated partnerships and restricted cash | 7 | 4 |  |
Investments | 0 | 0 |  |
Accounts receivable, net | 32 | 35 |  |
Inventories, net | 63 | 66 |  |
Property, plant and equipment, net | 71 | 72 |  |
Goodwill and intangible assets, net | 0 | 0 |  |
Assets held for sale | 0 | 0 |  |
Other assets | 5 | 6 |  |
Total assets | 179 | 183 |  |
LIABILITIES AND EQUITY |  |  |  |
Accounts payable, accrued expenses and other liabilities | 36 | 34 |  |
Securities sold, not yet purchased, at fair value | 0 | 0 |  |
Due to brokers | 0 | 0 |  |
Liabilities held for sale | 0 | 0 |  |
Debt | 6 | 5 |  |
Total liabilities | 42 | 39 |  |
Equity attributable to Icahn Enterprises | 137 | 144 |  |
Equity attributable to non-controlling interests | 0 | 0 |  |
Total equity | 137 | 144 |  |
Total liabilities and equity | 179 | 183 |  |
Holding Company |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 79 | 526 |  |
Cash held at consolidated affiliated partnerships and restricted cash | 0 | 0 |  |
Investments | 444 | 384 |  |
Accounts receivable, net | 0 | 0 |  |
Inventories, net | 0 | 0 |  |
Property, plant and equipment, net | 0 | 0 |  |
Goodwill and intangible assets, net | 0 | 0 |  |
Assets held for sale | 0 | 0 |  |
Other assets | 3 | 28 |  |
Total assets | 526 | 938 |  |
LIABILITIES AND EQUITY |  |  |  |
Accounts payable, accrued expenses and other liabilities | 182 | 243 |  |
Securities sold, not yet purchased, at fair value | 0 | 0 |  |
Due to brokers | 0 | 0 |  |
Liabilities held for sale | 0 | 0 |  |
Debt | 5,505 | 5,507 |  |
Total liabilities | 5,687 | 5,750 |  |
Equity attributable to Icahn Enterprises | (5,169) | (4,821) |  |
Equity attributable to non-controlling interests | 8 | 9 |  |
Total equity | (5,161) | (4,812) |  |
Total liabilities and equity | 526 | 938 |  |
Discontinued Operations [Member] |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 0 | 0 |  |
Cash held at consolidated affiliated partnerships and restricted cash | 0 | 0 |  |
Investments | 0 | 0 |  |
Accounts receivable, net | 0 | 0 |  |
Inventories, net | 0 | 0 |  |
Property, plant and equipment, net | 0 | 0 |  |
Goodwill and intangible assets, net | 0 | 0 |  |
Assets held for sale | 8,862 | 8,774 |  |
Other assets | 0 | 0 |  |
Total assets | 8,862 | 8,774 |  |
LIABILITIES AND EQUITY |  |  |  |
Accounts payable, accrued expenses and other liabilities | 0 | 0 |  |
Securities sold, not yet purchased, at fair value | 0 | 0 |  |
Due to brokers | 0 | 0 |  |
Liabilities held for sale | 6,145 | 6,202 |  |
Debt | 0 | 0 |  |
Total liabilities | 6,145 | 6,202 |  |
Equity attributable to Icahn Enterprises | 2,420 | 2,284 |  |
Equity attributable to non-controlling interests | 297 | 288 |  |
Total equity | 2,717 | 2,572 |  |
Total liabilities and equity | $ 8,862 | $ 8,774 |  |

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(22)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(24)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(14)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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- Definition Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3044-108585 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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