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Investments - Other Segments and Holding Company (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Schedule of Investments |  |  |  |  |
Investments | $ 4,877 |  | $ 4,877 |  | $ 9,151
Other Segments and Holding Company |  |  |  |  |
Schedule of Investments |  |  |  |  |
Investments | 91 |  | 91 |  | 199
Portion of unrealized (losses) gains that relates to equity securities still held | 0 | $ (86) | 61 | $ (42) |
Equity method investments | Other Segments and Holding Company |  |  |  |  |
Schedule of Investments |  |  |  |  |
Investments | 77 |  | 77 |  | 79
Other investments | Other Segments and Holding Company |  |  |  |  |
Schedule of Investments |  |  |  |  |
Investments | $ 14 |  | $ 14 |  | $ 120

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