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Investments (Tables) | 12 Months Ended
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Dec. 31, 2021
Schedule of Investments [Line Items] |
Investments Financial Information | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Hertz | ​ | Herbalife
​ | Year Ended December 31, | ​ | Year Ended December 31,
​ | 2021 |  | 2020 |  | 2019 | ​ | 2021 |  | 2020 |  | 2019
​ | (in millions)
Net sales/Other revenue from operations | $ | — | ​ | $ | 2,755 | ​ | $ | 9,779 | ​ | $ | — | ​ | $ | 2,609 | ​ | $ | 4,877
Cost of goods sold/Other expenses from operations | ​ | — | ​ | ​ | 3,231 | ​ | ​ | 8,051 | ​ | ​ | — | ​ | ​ | 518 | ​ | ​ | 958
Net (loss) income | ​ | — | ​ | ​ | (1,209) | ​ | ​ | (50) | ​ | ​ | — | ​ | ​ | 161 | ​ | ​ | 311
Net (loss) income attributable to investee shareholders |  | — | ​ |  | (1,203) | ​ |  | (58) | ​ |  | — | ​ |  | 161 | ​ |  | 311
Investment Segment |
Schedule of Investments [Line Items] |
Investment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2021 |  | 2020
​ | ​ | (in millions)
Assets | ​ | ​ | ​ | ​ | ​ | ​
Investments: |  | ​ |  |  | ​ |
Equity securities: |  | ​ |  |  | ​ |
Consumer, non-cyclical | ​ | $ | 680 | ​ | $ | 1,548
Consumer, cyclical | ​ |  | 1,633 | ​ |  | 2,073
Energy | ​ |  | 3,184 | ​ |  | 2,654
Utilities | ​ |  | 992 | ​ |  | 107
Healthcare | ​ |  | 959 | ​ |  | —
Technology | ​ |  | 931 | ​ |  | 1,578
Materials | ​ |  | 194 | ​ |  | —
Industrial | ​ |  | 265 | ​ |  | 158
​ | ​ |  | 8,838 | ​ |  | 8,118
Corporate debt securities | ​ |  | 114 | ​ |  | 121
​ | ​ | $ | 8,952 | ​ | $ | 8,239
Liabilities | ​ |  |  | ​ |  |
Securities sold, not yet purchased, at fair value: | ​ |  |  | ​ |  |
Equity securities: | ​ |  |  | ​ |  |
Consumer, non-cyclical | ​ | $ | 139 | ​ | $ | 424
Consumer, cyclical | ​ |  | 709 | ​ |  | 572
Energy | ​ |  | 2,028 | ​ |  | 1,476
Utilities | ​ |  | 659 | ​ |  | 49
Healthcare | ​ |  | 1,049 | ​ |  | —
Materials | ​ |  | 365 | ​ |  | —
Industrial | ​ | ​ | 391 | ​ | ​ | —
​ | ​ | $ | 5,340 | ​ | $ | 2,521
Other Segments and Holding Company |
Schedule of Investments [Line Items] |
Investment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2021 |  | 2020
​ | ​ | (in millions)
Equity method investments | ​ | $ | 79 | ​ | $ | 120
Held to maturity debt investments measured at amortized cost | ​ | ​ | — | ​ | ​ | 20
Other investments measured at fair value | ​ |  | 120 | ​ |  | 534
​ | ​ | $ | 199 | ​ | $ | 674

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