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Investment Information - Narrative (Details) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 USD ($) lots | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) lots | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) lots
Continuous unrealized loss, qualitative disclosures: |  |  |  |  |
Number of positions in an unrealized loss position (lots) | lots | 6,710 |  | 6,710 |  | 7,100
Total number of positions (lots) | lots | 19,840 |  | 19,840 |  | 15,720
Largest single loss | $ 4 |  | $ 4 |  | $ 6
Narrative items: |  |  |  |  |
Equity securities, at fair value | 1,623 |  | 1,623 |  | $ 1,186
Equity in net (loss) income of investment funds accounted for using the equity method | $ 171 | $ 59 | $ 437 | $ 176 |
Minimum |  |  |  |  |
Narrative items: |  |  |  |  |
Time lag for reporting |  |  | 1 month |  |
Maximum |  |  |  |  |
Narrative items: |  |  |  |  |
Time lag for reporting |  |  | 3 months |  |

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