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Commitments and Contingencies (Tables) | 3 Months Ended
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Mar. 31, 2025
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Personal Injury Liability Activity | Our personal injury liability activity was as follows:
Millions, for the three months ended March 31, | 2025 | 2024
Beginning balance | $ | 379 |  | $ | 383 |
Current year accruals | 26 |  | 29 |
Changes in estimates for prior years | 2 |  | (4) |
Payments | (42) |  | (32) |
Ending balance at March 31, | $ | 365 |  | $ | 376 |
Current portion, ending balance at March 31, | $ | 117 |  | $ | 112 |
Schedule of Environmental Liability Activity | Our environmental liability activity was as follows:
Millions, for the three months ended March 31, | 2025 | 2024
Beginning balance | $ | 268 |  | $ | 245 |
Accruals | 17 |  | 28 |
Payments | (21) |  | (19) |
Ending balance at March 31, | $ | 264 |  | $ | 254 |
Current portion, ending balance at March 31, | $ | 76 |  | $ | 92 |

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