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Investments in equity securities (Tables) | 6 Months Ended
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Jun. 30, 2025
Investments, Debt and Equity Securities [Abstract] |
Schedule of investments in equity securities | Investments in equity securities are summarized as follows (in millions).
| Cost Basis |  |  | Net Unrealized Gains |  |  | Fair Value |
June 30, 2025 |  |  |  |  |  |  |  |
Banks, insurance and finance | $ | 14,080 |  |  | $ | 79,344 |  |  | $ | 93,424 |
Consumer products |  | 13,418 |  |  |  | 78,057 |  |  |  | 91,475 |
Commercial, industrial and other |  | 51,900 |  |  |  | 31,124 |  |  |  | 83,024 |
| $ | 79,398 |  |  | $ | 188,525 |  |  | $ | 267,923 |
December 31, 2024 |  |  |  |  |  |  |  |
Banks, insurance and finance | $ | 15,707 |  |  | $ | 75,936 |  |  | $ | 91,643 |
Consumer products |  | 12,658 |  |  |  | 92,091 |  |  |  | 104,749 |
Commercial, industrial and other |  | 47,141 |  |  |  | 28,055 |  |  |  | 75,196 |
| $ | 75,506 |  |  | $ | 196,082 |  |  | $ | 271,588 |

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