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Supplemental cash flow information (Tables) | 12 Months Ended
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Dec. 31, 2024
Supplemental Cash Flow Elements [Abstract] |
Schedule of supplemental cash flow information | A summary of supplemental cash flow information follows (in millions).
|  | 2024 |  |  | 2023 |  |  | 2022 |
Cash paid during the year for: |  |  |  |  |  |  |  |  |
Income taxes |  | $ | 28,544 |  |  | $ | 7,765 |  |  | $ | 4,236 |
Interest: |  |  |  |  |  |  |  |  |
Insurance and other |  |  | 1,362 |  |  |  | 1,670 |  |  |  | 1,150 |
Railroad, utilities and energy |  |  | 3,577 |  |  |  | 3,327 |  |  |  | 3,195 |
Non-cash investing and financing activities: |  |  |  |  |  |  |  |  |
Liabilities assumed in connection with business acquisitions |  |  | 22 |  |  |  | 10,938 |  |  |  | 24,186 |
Operating lease liabilities arising from obtaining right-of-use assets |  |  | 2,007 |  |  |  | 1,645 |  |  |  | 1,118 |
Class B common stock issued in exchange for noncontrolling interests |  |  | 1,045 |  |  |  | — |  |  |  | — |

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