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Segment Reporting - Condensed Statements of Operations (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Net sales | $ 10,304 | $ 6,815 | $ 9,722
Other revenues from operations | 637 | 608 | 666
Net gain (loss) from investment activities | 193 | (1,421) | (1,931)
Interest and dividend income | 137 | 169 | 265
Gain (loss) on disposition of assets, net | 141 | (17) | 253
Other (loss) income, net | (84) | (31) | 19
Total revenues | 11,328 | 6,123 | 8,994
Cost of goods sold | 9,481 | 6,320 | 8,205
Other expenses from operations | 513 | 487 | 528
Selling, general and administrative | 1,241 | 1,191 | 1,375
Restructuring, net | 5 | 10 | 18
Impairment | 0 | 11 | 2
Interest expense | 666 | 688 | 605
Total Expenses | 11,906 | 8,707 | 10,733
(Loss) income from continuing operations before income tax benefit (expense) | (578) | (2,584) | (1,739)
Income tax benefit (expense) | 78 | 116 | (20)
Net income (loss) from continuing operations | (500) | (2,468) | (1,759)
Less: net (loss) income from continuing operations attributable to non-controlling interests | 18 | (815) | (693)
Net (loss) income from continuing operations attributable to Icahn Enterprises | (518) | (1,653) | (1,066)
Capital expenditures | 305 | 199 | 250
Depreciation and amortization | 517 | 510 | 519
Investment Segment |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Net sales | 0 |  |
Other revenues from operations | 0 |  |
Net gain (loss) from investment activities | 145 | (1,368) | (1,599)
Interest and dividend income | 132 | 136 | 190
Gain (loss) on disposition of assets, net | 0 |  |
Other (loss) income, net | (75) | (17) | (5)
Total revenues | 202 | (1,249) | (1,414)
Cost of goods sold | 0 |  |
Other expenses from operations | 0 |  |
Selling, general and administrative | 16 | 2 | 23
Restructuring, net | 0 |  |
Impairment | 0 |  |
Interest expense | 218 | 196 | 106
Total Expenses | 234 | 198 | 129
(Loss) income from continuing operations before income tax benefit (expense) | (32) | (1,447) | (1,543)
Income tax benefit (expense) | 0 |  |
Net income (loss) from continuing operations | (32) | (1,447) | (1,543)
Less: net (loss) income from continuing operations attributable to non-controlling interests | (16) | (682) | (768)
Net (loss) income from continuing operations attributable to Icahn Enterprises | (16) | (765) | (775)
Capital expenditures | 0 |  |
Depreciation and amortization | 0 |  |
Energy Segment |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Net sales | 7,242 | 3,930 | 6,364
Other revenues from operations | 0 |  |
Net gain (loss) from investment activities | 81 | 34 |
Interest and dividend income | 0 | 10 | 4
Gain (loss) on disposition of assets, net | (3) | (7) | 4
Other (loss) income, net | 7 | (1) | 13
Total revenues | 7,327 | 3,966 | 6,385
Cost of goods sold | 7,069 | 4,164 | 5,707
Other expenses from operations | 0 |  |
Selling, general and administrative | 147 | 116 | 146
Restructuring, net | 0 |  |
Impairment | 0 |  |
Interest expense | 109 | 125 | 106
Total Expenses | 7,325 | 4,405 | 5,959
(Loss) income from continuing operations before income tax benefit (expense) | 2 | (439) | 426
Income tax benefit (expense) | 27 | 112 | (112)
Net income (loss) from continuing operations | 29 | (327) | 314
Less: net (loss) income from continuing operations attributable to non-controlling interests | 34 | (133) | 68
Net (loss) income from continuing operations attributable to Icahn Enterprises | (5) | (194) | 246
Capital expenditures | 224 | 124 | 121
Depreciation and amortization | 343 | 343 | 352
Automotive Segment |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Net sales | 1,789 | 1,929 | 2,293
Other revenues from operations | 595 | 549 | 591
Net gain (loss) from investment activities | 0 |  |
Interest and dividend income | 0 |  |
Gain (loss) on disposition of assets, net | (22) | (6) | (4)
Other (loss) income, net | (2) | (7) | 15
Total revenues | 2,360 | 2,465 | 2,895
Cost of goods sold | 1,335 | 1,344 | 1,615
Other expenses from operations | 466 | 449 | 474
Selling, general and administrative | 880 | 904 | 1,032
Restructuring, net | 4 | 8 | 6
Impairment | 0 |  |
Interest expense | 7 | 12 | 20
Total Expenses | 2,692 | 2,717 | 3,147
(Loss) income from continuing operations before income tax benefit (expense) | (332) | (252) | (252)
Income tax benefit (expense) | 72 | 54 | 55
Net income (loss) from continuing operations | (260) | (198) | (197)
Less: net (loss) income from continuing operations attributable to non-controlling interests | 0 |  |
Net (loss) income from continuing operations attributable to Icahn Enterprises | (260) | (198) | (197)
Capital expenditures | 48 | 35 | 47
Depreciation and amortization | 87 | 95 | 98
Food Packaging Segment |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Net sales | 416 | 409 | 385
Other revenues from operations | 0 |  |
Net gain (loss) from investment activities | 0 |  |
Interest and dividend income | 0 |  |
Gain (loss) on disposition of assets, net | 0 |  |
Other (loss) income, net | (14) | (6) | (8)
Total revenues | 402 | 403 | 377
Cost of goods sold | 343 | 327 | 312
Other expenses from operations | 0 |  |
Selling, general and administrative | 50 | 52 | 55
Restructuring, net | 1 | 1 | 8
Impairment | 0 |  | 1
Interest expense | 6 | 11 | 17
Total Expenses | 400 | 391 | 393
(Loss) income from continuing operations before income tax benefit (expense) | 2 | 12 | (16)
Income tax benefit (expense) | (4) | (8) | (6)
Net income (loss) from continuing operations | (2) | 4 | (22)
Less: net (loss) income from continuing operations attributable to non-controlling interests | 0 |  | (5)
Net (loss) income from continuing operations attributable to Icahn Enterprises | (2) | 4 | (17)
Capital expenditures | 17 | 19 | 17
Depreciation and amortization | 28 | 27 | 26
Metals Segment |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Net sales | 524 | 313 | 340
Other revenues from operations | 0 |  |
Net gain (loss) from investment activities | 0 |  |
Interest and dividend income | 0 |  |
Gain (loss) on disposition of assets, net | 163 | 1 | 1
Other (loss) income, net | (3) | 3 |
Total revenues | 684 | 317 | 341
Cost of goods sold | 481 | 298 | 343
Other expenses from operations | 0 |  |
Selling, general and administrative | 16 | 16 | 15
Restructuring, net | 0 | 1 | 3
Impairment | 0 | 1 | 1
Interest expense | 1 | 1 | 1
Total Expenses | 498 | 317 | 363
(Loss) income from continuing operations before income tax benefit (expense) | 186 |  | (22)
Income tax benefit (expense) | 0 |  |
Net income (loss) from continuing operations | 186 |  | (22)
Less: net (loss) income from continuing operations attributable to non-controlling interests | 0 |  |
Net (loss) income from continuing operations attributable to Icahn Enterprises | 186 |  | (22)
Capital expenditures | 3 | 3 | 24
Depreciation and amortization | 14 | 18 | 19
Real Estate Segment |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Net sales | 55 | 43 | 23
Other revenues from operations | 38 | 59 | 75
Interest and dividend income |  | 1 | 1
Gain (loss) on disposition of assets, net | 3 | (5) |
Other (loss) income, net |  |  | 4
Total revenues | 96 | 98 | 103
Cost of goods sold | 44 | 35 | 18
Other expenses from operations | 47 | 38 | 54
Selling, general and administrative | 13 | 34 | 21
Impairment |  | 7 |
Total Expenses | 104 | 114 | 93
(Loss) income from continuing operations before income tax benefit (expense) | (8) | (16) | 10
Income tax benefit (expense) |  |  | 6
Net income (loss) from continuing operations | (8) | (16) | 16
Net (loss) income from continuing operations attributable to Icahn Enterprises | (8) | (16) | 16
Capital expenditures | 10 | 11 | 22
Depreciation and amortization | 9 | 17 | 17
Home Fashion Segment |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Net sales | 197 | 188 | 187
Other revenues from operations | 0 |  |
Net gain (loss) from investment activities | 0 |  |
Interest and dividend income | 0 |  |
Gain (loss) on disposition of assets, net | 0 |  |
Other (loss) income, net | 0 | 2 | (1)
Total revenues | 197 | 190 | 186
Cost of goods sold | 159 | 150 | 159
Other expenses from operations | 0 |  |
Selling, general and administrative | 46 | 43 | 42
Restructuring, net | 0 |  | 1
Impairment | 0 | 3 |
Interest expense | 2 | 1 | 1
Total Expenses | 207 | 197 | 203
(Loss) income from continuing operations before income tax benefit (expense) | (10) | (7) | (17)
Income tax benefit (expense) | 2 |  |
Net income (loss) from continuing operations | (8) | (7) | (17)
Less: net (loss) income from continuing operations attributable to non-controlling interests | 0 |  |
Net (loss) income from continuing operations attributable to Icahn Enterprises | (8) | (7) | (17)
Capital expenditures | 3 | 5 | 5
Depreciation and amortization | 7 | 8 | 7
Pharma Segment |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Net sales | 81 | 3 |
Other revenues from operations | 4 |  |
Net gain (loss) from investment activities | 0 |  |
Interest and dividend income | 0 |  |
Gain (loss) on disposition of assets, net | 0 |  |
Other (loss) income, net | 0 |  |
Total revenues | 85 | 3 |
Cost of goods sold | 50 | 2 |
Other expenses from operations | 0 |  |
Selling, general and administrative | 38 | 2 |
Restructuring, net | 0 |  |
Impairment | 0 |  |
Interest expense | 0 |  |
Total Expenses | 88 | 4 |
(Loss) income from continuing operations before income tax benefit (expense) | (3) | (1) |
Income tax benefit (expense) | 0 |  |
Net income (loss) from continuing operations | (3) | (1) |
Less: net (loss) income from continuing operations attributable to non-controlling interests | 0 |  |
Net (loss) income from continuing operations attributable to Icahn Enterprises | (3) | (1) |
Capital expenditures | 0 |  |
Depreciation and amortization | 28 | 2 |
Mining Segment |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Net sales | 0 |  | 130
Other revenues from operations | 0 |  |
Net gain (loss) from investment activities | 0 |  |
Interest and dividend income | 0 |  | 1
Gain (loss) on disposition of assets, net | 0 |  | 252
Other (loss) income, net | 0 |  | (1)
Total revenues | 0 |  | 382
Cost of goods sold | 0 |  | 51
Other expenses from operations | 0 |  |
Selling, general and administrative | 0 |  | 15
Restructuring, net | 0 |  |
Impairment | 0 |  |
Interest expense | 0 |  | 4
Total Expenses | 0 |  | 70
(Loss) income from continuing operations before income tax benefit (expense) | 0 |  | 312
Income tax benefit (expense) | 0 |  | (1)
Net income (loss) from continuing operations | 0 |  | 311
Less: net (loss) income from continuing operations attributable to non-controlling interests | 0 |  | 12
Net (loss) income from continuing operations attributable to Icahn Enterprises | 0 |  | 299
Capital expenditures | 0 |  | 14
Depreciation and amortization | 0 |  |
Holding Company |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Net sales | 0 |  |
Other revenues from operations | 0 |  |
Net gain (loss) from investment activities | (33) | (87) | (332)
Interest and dividend income | 5 | 22 | 69
Gain (loss) on disposition of assets, net | 0 |  |
Other (loss) income, net | 3 | (5) | 2
Total revenues | (25) | (70) | (261)
Cost of goods sold | 0 |  |
Other expenses from operations | 0 |  |
Selling, general and administrative | 35 | 22 | 26
Restructuring, net | 0 |  |
Impairment | 0 |  |
Interest expense | 323 | 342 | 350
Total Expenses | 358 | 364 | 376
(Loss) income from continuing operations before income tax benefit (expense) | (383) | (434) | (637)
Income tax benefit (expense) | (19) | (42) | 38
Net income (loss) from continuing operations | (402) | (476) | (599)
Less: net (loss) income from continuing operations attributable to non-controlling interests | 0 |  |
Net (loss) income from continuing operations attributable to Icahn Enterprises | (402) | (476) | $ (599)
Capital expenditures | 0 | $ 2 |
Depreciation and amortization | $ 1 |  |

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