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Condensed Balance Sheets By Reporting Segment (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | --- | --- | --- | --- | ---
ASSETS |  |  |  |  |  |  |  |
Cash and cash equivalents | $ 3,266 |  |  | $ 2,656 |  |  |  |
Cash held at consolidated affiliated partnerships and restricted cash | 613 |  |  | 2,682 |  |  |  |
Investments | 9,437 |  |  | 8,337 |  |  |  |
Accounts receivable, net | 500 |  |  | 474 |  |  |  |
Inventories, net | 1,817 |  |  | 1,779 |  |  |  |
Property, plant and equipment, net | 4,592 |  |  | 4,688 |  |  |  |
Goodwill and intangible assets, net | 730 |  |  | 748 |  |  |  |
Other assets | 2,302 |  |  | 2,125 |  |  |  |
Assets | 23,257 |  |  | 23,489 |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |
Accounts payable, accrued expenses and other liabilities | 4,437 |  |  | 2,715 |  |  |  |
Securities sold, not yet purchased, at fair value | 223 |  |  | 468 |  |  |  |
Debt | 7,449 |  |  | 7,326 |  |  |  |
Total liabilities | 12,109 |  |  | 10,509 |  |  |  |
Equity attributable to Icahn Enterprises | 5,633 |  |  | 6,560 |  |  |  |
Equity attributable to non-controlling interests | 5,515 |  |  | 6,420 |  |  |  |
Total equity | 11,148 | $ 11,446 | $ 11,652 | 12,980 | $ 12,421 | $ 12,544 | $ 11,862 | $ 11,486
Liabilities and Equity | 23,257 |  |  | 23,489 |  |  |  |
Investment Segment |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |
Cash and cash equivalents | 9 |  |  | 5 |  |  |  |
Cash held at consolidated affiliated partnerships and restricted cash | 600 |  |  | 2,648 |  |  |  |
Investments | 8,718 |  |  | 6,867 |  |  |  |
Accounts receivable, net | 0 |  |  | 0 |  |  |  |
Inventories, net | 0 |  |  | 0 |  |  |  |
Property, plant and equipment, net | 0 |  |  | 0 |  |  |  |
Goodwill and intangible assets, net | 0 |  |  | 0 |  |  |  |
Other assets | 1,155 |  |  | 1,230 |  |  |  |
Assets | 10,482 |  |  | 10,750 |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |
Accounts payable, accrued expenses and other liabilities | 1,500 |  |  | 181 |  |  |  |
Securities sold, not yet purchased, at fair value | 223 |  |  | 468 |  |  |  |
Debt | 0 |  |  | 0 |  |  |  |
Total liabilities | 1,723 |  |  | 649 |  |  |  |
Equity attributable to Icahn Enterprises | 4,283 |  |  | 5,066 |  |  |  |
Equity attributable to non-controlling interests | 4,476 |  |  | 5,035 |  |  |  |
Total equity | 8,759 |  |  | 10,101 |  |  |  |
Liabilities and Equity | 10,482 |  |  | 10,750 |  |  |  |
Energy Segment |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |
Cash and cash equivalents | 692 |  |  | 668 |  |  |  |
Cash held at consolidated affiliated partnerships and restricted cash | 0 |  |  | 0 |  |  |  |
Investments | 82 |  |  | 84 |  |  |  |
Accounts receivable, net | 181 |  |  | 169 |  |  |  |
Inventories, net | 388 |  |  | 380 |  |  |  |
Property, plant and equipment, net | 2,919 |  |  | 3,027 |  |  |  |
Goodwill and intangible assets, net | 263 |  |  | 278 |  |  |  |
Other assets | 222 |  |  | 225 |  |  |  |
Assets | 4,747 |  |  | 4,831 |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |
Accounts payable, accrued expenses and other liabilities | 1,185 |  |  | 1,043 |  |  |  |
Securities sold, not yet purchased, at fair value | 0 |  |  | 0 |  |  |  |
Debt | 1,195 |  |  | 1,170 |  |  |  |
Total liabilities | 2,380 |  |  | 2,213 |  |  |  |
Equity attributable to Icahn Enterprises | 1,342 |  |  | 1,274 |  |  |  |
Equity attributable to non-controlling interests | 1,025 |  |  | 1,344 |  |  |  |
Total equity | 2,367 |  |  | 2,618 |  |  |  |
Liabilities and Equity | 4,747 |  |  | 4,831 |  |  |  |
Automotive Segment |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |
Cash and cash equivalents | 48 |  |  | 43 |  |  |  |
Cash held at consolidated affiliated partnerships and restricted cash | 0 |  |  | 0 |  |  |  |
Investments | 117 |  |  | 59 |  |  |  |
Accounts receivable, net | 158 |  |  | 149 |  |  |  |
Inventories, net | 1,210 |  |  | 1,203 |  |  |  |
Property, plant and equipment, net | 936 |  |  | 941 |  |  |  |
Goodwill and intangible assets, net | 385 |  |  | 412 |  |  |  |
Other assets | 696 |  |  | 217 |  |  |  |
Assets | 3,550 |  |  | 3,024 |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |
Accounts payable, accrued expenses and other liabilities | 1,305 |  |  | 905 |  |  |  |
Securities sold, not yet purchased, at fair value | 0 |  |  | 0 |  |  |  |
Debt | 403 |  |  | 372 |  |  |  |
Total liabilities | 1,708 |  |  | 1,277 |  |  |  |
Equity attributable to Icahn Enterprises | 1,842 |  |  | 1,747 |  |  |  |
Equity attributable to non-controlling interests | 0 |  |  | 0 |  |  |  |
Total equity | 1,842 |  |  | 1,747 |  |  |  |
Liabilities and Equity | 3,550 |  |  | 3,024 |  |  |  |
Food Packaging Segment |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |
Cash and cash equivalents | 18 |  |  | 46 |  |  |  |
Cash held at consolidated affiliated partnerships and restricted cash | 1 |  |  | 1 |  |  |  |
Investments | 0 |  |  | 0 |  |  |  |
Accounts receivable, net | 84 |  |  | 74 |  |  |  |
Inventories, net | 103 |  |  | 93 |  |  |  |
Property, plant and equipment, net | 160 |  |  | 169 |  |  |  |
Goodwill and intangible assets, net | 30 |  |  | 32 |  |  |  |
Other assets | 124 |  |  | 96 |  |  |  |
Assets | 520 |  |  | 511 |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |
Accounts payable, accrued expenses and other liabilities | 195 |  |  | 164 |  |  |  |
Securities sold, not yet purchased, at fair value | 0 |  |  | 0 |  |  |  |
Debt | 269 |  |  | 273 |  |  |  |
Total liabilities | 464 |  |  | 437 |  |  |  |
Equity attributable to Icahn Enterprises | 42 |  |  | 55 |  |  |  |
Equity attributable to non-controlling interests | 14 |  |  | 19 |  |  |  |
Total equity | 56 |  |  | 74 |  |  |  |
Liabilities and Equity | 520 |  |  | 511 |  |  |  |
Metals Segment |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |
Cash and cash equivalents | 3 |  |  | 20 |  |  |  |
Cash held at consolidated affiliated partnerships and restricted cash | 1 |  |  | 1 |  |  |  |
Investments | 0 |  |  | 0 |  |  |  |
Accounts receivable, net | 41 |  |  | 48 |  |  |  |
Inventories, net | 38 |  |  | 39 |  |  |  |
Property, plant and equipment, net | 122 |  |  | 115 |  |  |  |
Goodwill and intangible assets, net | 13 |  |  | 2 |  |  |  |
Other assets | 21 |  |  | 8 |  |  |  |
Assets | 239 |  |  | 233 |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |
Accounts payable, accrued expenses and other liabilities | 65 |  |  | 56 |  |  |  |
Securities sold, not yet purchased, at fair value | 0 |  |  | 0 |  |  |  |
Debt | 10 |  |  | 0 |  |  |  |
Total liabilities | 75 |  |  | 56 |  |  |  |
Equity attributable to Icahn Enterprises | 164 |  |  | 177 |  |  |  |
Equity attributable to non-controlling interests | 0 |  |  | 0 |  |  |  |
Total equity | 164 |  |  | 177 |  |  |  |
Liabilities and Equity | 239 |  |  | 233 |  |  |  |
Real Estate Segment |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |
Cash and cash equivalents | 40 |  |  | 39 |  |  |  |
Cash held at consolidated affiliated partnerships and restricted cash | 2 |  |  | 26 |  |  |  |
Investments | 15 |  |  | 15 |  |  |  |
Accounts receivable, net | 4 |  |  | 3 |  |  |  |
Inventories, net | 0 |  |  | 0 |  |  |  |
Property, plant and equipment, net | 387 |  |  | 367 |  |  |  |
Goodwill and intangible assets, net | 18 |  |  | 24 |  |  |  |
Other assets | 33 |  |  | 34 |  |  |  |
Assets | 499 |  |  | 508 |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |
Accounts payable, accrued expenses and other liabilities | 40 |  |  | 41 |  |  |  |
Securities sold, not yet purchased, at fair value | 0 |  |  | 0 |  |  |  |
Debt | 2 |  |  | 2 |  |  |  |
Total liabilities | 42 |  |  | 43 |  |  |  |
Equity attributable to Icahn Enterprises | 457 |  |  | 465 |  |  |  |
Equity attributable to non-controlling interests | 0 |  |  | 0 |  |  |  |
Total equity | 457 |  |  | 465 |  |  |  |
Liabilities and Equity | 499 |  |  | 508 |  |  |  |
Home Fashion Segment |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |
Cash and cash equivalents | 3 |  |  | 1 |  |  |  |
Cash held at consolidated affiliated partnerships and restricted cash | 0 |  |  | 2 |  |  |  |
Investments | 0 |  |  | 0 |  |  |  |
Accounts receivable, net | 32 |  |  | 31 |  |  |  |
Inventories, net | 78 |  |  | 64 |  |  |  |
Property, plant and equipment, net | 68 |  |  | 69 |  |  |  |
Goodwill and intangible assets, net | 21 |  |  | 0 |  |  |  |
Other assets | 21 |  |  | 5 |  |  |  |
Assets | 223 |  |  | 172 |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |
Accounts payable, accrued expenses and other liabilities | 55 |  |  | 35 |  |  |  |
Securities sold, not yet purchased, at fair value | 0 |  |  | 0 |  |  |  |
Debt | 19 |  |  | 4 |  |  |  |
Total liabilities | 74 |  |  | 39 |  |  |  |
Equity attributable to Icahn Enterprises | 149 |  |  | 133 |  |  |  |
Equity attributable to non-controlling interests | 0 |  |  | 0 |  |  |  |
Total equity | 149 |  |  | 133 |  |  |  |
Liabilities and Equity | 223 |  |  | 172 |  |  |  |
Mining Segment |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  | 0 |  |  |  |
Cash held at consolidated affiliated partnerships and restricted cash |  |  |  | 0 |  |  |  |
Investments |  |  |  | 0 |  |  |  |
Accounts receivable, net |  |  |  | 0 |  |  |  |
Inventories, net |  |  |  | 0 |  |  |  |
Property, plant and equipment, net |  |  |  | 0 |  |  |  |
Goodwill and intangible assets, net |  |  |  | 0 |  |  |  |
Other assets |  |  |  | 299 |  |  |  |
Assets |  |  |  | 299 |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |
Accounts payable, accrued expenses and other liabilities |  |  |  | 112 |  |  |  |
Securities sold, not yet purchased, at fair value |  |  |  | 0 |  |  |  |
Debt |  |  |  | 0 |  |  |  |
Total liabilities |  |  |  | 112 |  |  |  |
Equity attributable to Icahn Enterprises |  |  |  | 165 |  |  |  |
Equity attributable to non-controlling interests |  |  |  | 22 |  |  |  |
Total equity |  |  |  | 187 |  |  |  |
Liabilities and Equity |  |  |  | 299 |  |  |  |
Holding Company |  |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |  |
Cash and cash equivalents | 2,453 |  |  | 1,834 |  |  |  |
Cash held at consolidated affiliated partnerships and restricted cash | 9 |  |  | 4 |  |  |  |
Investments | 505 |  |  | 1,312 |  |  |  |
Accounts receivable, net | 0 |  |  | 0 |  |  |  |
Inventories, net | 0 |  |  | 0 |  |  |  |
Property, plant and equipment, net | 0 |  |  | 0 |  |  |  |
Goodwill and intangible assets, net | 0 |  |  | 0 |  |  |  |
Other assets | 30 |  |  | 11 |  |  |  |
Assets | 2,997 |  |  | 3,161 |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |  |
Accounts payable, accrued expenses and other liabilities | 92 |  |  | 178 |  |  |  |
Securities sold, not yet purchased, at fair value | 0 |  |  | 0 |  |  |  |
Debt | 5,551 |  |  | 5,505 |  |  |  |
Total liabilities | 5,643 |  |  | 5,683 |  |  |  |
Equity attributable to Icahn Enterprises | (2,646) |  |  | (2,522) |  |  |  |
Equity attributable to non-controlling interests | 0 |  |  | 0 |  |  |  |
Total equity | (2,646) |  |  | (2,522) |  |  |  |
Liabilities and Equity | $ 2,997 |  |  | $ 3,161 |  |  |  |

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- Definition The amount of ownership interest of different classes of partners in limited partnership. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 + Details
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- Definition Total of all Partners' Capital (deficit) items which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 5.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -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 6: http://fasb.org/us-gaap/role/ref/legacyRef -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=119400593&loc=d3e572229-122910 + Details
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- Definition Amount of partners' capital (deficit), including portions attributable to both the parent and noncontrolling interests. Excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + 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://fasb.org/us-gaap/role/ref/legacyRef -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 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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=119400593&loc=d3e572229-122910 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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