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Investment gains (losses) (Tables) | 3 Months Ended
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Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract] |
Summary of investment gains (losses) | Investment gains (losses) in the first quarter of 2024 and 2023 are summarized as follows (in millions).
|  |  |  | First Quarter |
|  |  |  |  |  | 2024 |  |  | 2023 |
Investment gains (losses): |  |  |  |  |  |  |  |  |  |
Equity securities: |  |  |  |  |  |  |  |  |  |
Change in unrealized investment gains (losses) during the period on securities held at the end of the period |  |  |  |  |  | $ | 3,982 |  |  | $ | 31,317 |
Investment gains (losses) on securities sold during the period |  |  |  |  |  |  | (2,104 | ) |  |  | 370 |
|  |  |  |  |  |  | 1,878 |  |  |  | 31,687 |
Fixed maturity securities: |  |  |  |  |  |  |  |  |  |
Gross realized gains |  |  |  |  |  |  | 13 |  |  |  | 124 |
Gross realized losses |  |  |  |  |  |  | (12 | ) |  |  | (52 | )
Other |  |  |  |  |  |  | (3 | ) |  |  | 2,999 |
|  |  |  |  |  | $ | 1,876 |  |  | $ | 34,758 |

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- Definition Tabular disclosure of realized and unrealized gain (loss) on investment in security. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(9)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
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- References No definition available. + Details
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