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Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2023
Supplemental Cash Flow Information [Abstract] |
Cash Flow Information |
| Millions of Dollars
| 2023 | 2022 | 2021
Noncash Investing and Financing Activities |  |  |
Increase (decrease) in PP&E related to an increase (decrease) in asset retirement obligations | $ | 727 |  | 825 |  | 442 |
Fair value of contingent consideration on acquisition | 320 |  |  |
Cash Payments |  |  |
Interest | $ | 701 |  | 873 |  | 924 |
Income taxes | 5,406 |  | 7,368 |  | 856 |
Net Sales (Purchases) of Investments |  |  |
Short-term investments purchased | $ | (1,463) |  | (5,046) |  | (5,554) |
Short-term investments sold | 3,574 |  | 3,102 |  | 8,810 |
Investments and long-term receivables purchased | (867) |  | (775) |  | (279) |
Investments and long-term receivables sold | 129 |  | 90 |  | 114 |
| $ | 1,373 |  | (2,629) |  | 3,091 |

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