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Investments - Other Segments and Holding Company (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Schedule of Investments |  |  |
Investments | $ 6,809 | $ 9,151 |
Other Segments and Holding Company |  |  |
Schedule of Investments |  |  |
Investments | 90 | 199 |
Portion of unrealized (losses) gains that relates to equity securities still held | 61 | 61 | $ 36
Equity method investments | Other Segments and Holding Company |  |  |
Schedule of Investments |  |  |
Investments | 76 | 79 |
Other investments | Other Segments and Holding Company |  |  |
Schedule of Investments |  |  |
Investments | $ 14 | $ 120 |

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