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Investments Investment Segment (Details) - USD ($) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jan. 31, 2021 | Aug. 31, 2020 | Jun. 30, 2020
Schedule of Investments [Line Items] |  |  |  |  |  |
Investments | $ 8,913 | $ 9,945 |  |  |  |
Securities sold, not yet purchased, at fair value | 2,521 | 1,190 |  |  |  |
Fair value of equity method investment under fair value option | 985 | 3,137 |  |  |  |
Unrealized gain on equity method investments under fair value option | (427) | 265 | $ 667 |  |  |
Total Assets | 24,987 | 24,639 |  |  |  |
Total liabilities | 15,730 | 13,697 |  |  |  |
Total revenues | 6,123 | 8,994 | 11,777 |  |  |
Net sales/Other revenue from operations | 6,815 | 9,722 | 10,576 |  |  |
Cost of goods sold/Other expenses from operations | 6,320 | 8,205 | 8,993 |  |  |
Net (loss) income | (2,468) | (1,791) | 2,001 |  |  |
Net (loss) income attributable to investee shareholders | (1,653) | (1,098) | 1,482 |  |  |
Investment Segment |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Investments | 8,239 | 9,207 |  |  |  |
Securities sold, not yet purchased, at fair value | 2,521 | 1,190 |  |  |  |
Portion of unrealized (losses) gains that relates to equity and debt securities still held | 65 | 706 | (800) |  |  |
Total Assets | 14,119 | 11,283 |  |  |  |
Total liabilities | 4,777 | 2,500 |  |  |  |
Total revenues | (1,249) | (1,414) | 737 |  |  |
Net sales/Other revenue from operations | 0 |  |  |  |  |
Cost of goods sold/Other expenses from operations | 0 |  |  |  |  |
Investment Segment | Equity securities |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Investments | 8,118 | 9,062 |  |  |  |
Investment Segment | Debt securities |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Investments | 121 | 145 |  |  |  |
Investment Segment | Basic materials |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Investments |  | 281 |  |  |  |
Securities sold, not yet purchased, at fair value |  | 209 |  |  |  |
Investment Segment | Consumer, non-cyclical |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Investments | 1,548 | 2,085 |  |  |  |
Securities sold, not yet purchased, at fair value | 424 | 29 |  |  |  |
Investment Segment | Consumer, cyclical |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Investments | 2,073 | 2,427 |  |  |  |
Securities sold, not yet purchased, at fair value | 572 | 379 |  |  |  |
Investment Segment | Energy |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Investments | 2,654 | 1,717 |  |  |  |
Securities sold, not yet purchased, at fair value | 1,476 | 124 |  |  |  |
Investment Segment | Utilities |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Investments | 107 |  |  |  |  |
Securities sold, not yet purchased, at fair value | 49 |  |  |  |  |
Investment Segment | Financial |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Securities sold, not yet purchased, at fair value |  | 152 |  |  |  |
Investment Segment | Industrial |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Investments | 158 | 127 |  |  |  |
Investment Segment | Technology |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Investments | 1,578 | 2,425 |  |  |  |
Securities sold, not yet purchased, at fair value |  | 217 |  |  |  |
Investment Segment | Communication |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Securities sold, not yet purchased, at fair value |  | 80 |  |  |  |
Hertz |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Ownership percentage in equity method investment |  |  |  |  |  | 38.90%
Fair value of equity method investment under fair value option |  | 551 |  |  |  |
Unrealized gain on equity method investments under fair value option | (637) | 105 | (197) |  |  |
Total Assets | 24,627 |  |  |  |  |
Total liabilities | 22,739 |  |  |  |  |
Non-controlling interests | 119 |  |  |  |  |
Equity attributable to investee shareholders | 1,769 |  |  |  |  |
Net sales/Other revenue from operations | 2,755 | 9,779 | 9,504 |  |  |
Cost of goods sold/Other expenses from operations | 3,231 | 8,051 | 8,045 |  |  |
Net (loss) income | (1,209) | (50) | (227) |  |  |
Net (loss) income attributable to investee shareholders | $ (1,203) | (58) | (225) |  |  |
Caesars |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Ownership percentage in equity method investment | 16.70% |  |  |  |  |
Fair value of equity method investment under fair value option |  | 1,243 |  |  |  |
Unrealized gain on equity method investments under fair value option | $ 49 | 478 |  |  |  |
Herbalife |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Ownership percentage in equity method investment | 15.50% |  |  | 6.70% | 23.80% |
Fair value of equity method investment under fair value option | $ 985 | 1,343 |  |  |  |
Unrealized gain on equity method investments under fair value option | 161 | (318) | 864 |  |  |
Total Assets |  | 2,679 |  |  |  |
Total liabilities |  | 3,069 |  |  |  |
Equity attributable to investee shareholders |  | (390) |  |  |  |
Net sales/Other revenue from operations | 2,609 | 4,877 | 4,892 |  |  |
Cost of goods sold/Other expenses from operations | 518 | 958 | 919 |  |  |
Net (loss) income | 161 | 311 | 297 |  |  |
Net (loss) income attributable to investee shareholders | $ 161 | $ 311 | $ 297 |  |  |

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