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Commitments And Contingencies (Tables) | 9 Months Ended
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Sep. 30, 2020
Commitments And Contingencies [Abstract] |
Commitments And Contingencies Activity | Our personal injury liability activity was as follows:
Millions, |  |  |  |
for the Nine Months Ended September 30, | 2020 | 2019
Beginning balance | $ | 265 | $ | 271
Current year accruals |  | 52 |  | 59
Changes in estimates for prior years |  | (4) |  | (17)
Payments |  | (47) |  | (41)
Ending balance at September 30 | $ | 266 | $ | 272
Current portion, ending balance at September 30 | $ | 62 | $ | 61
Commitments And Contingencies Activity. | Our environmental liability activity was as follows:
Millions, |  |  |  |
for the Nine Months Ended September 30, | 2020 | 2019
Beginning balance | $ | 227 | $ | 223
Accruals |  | 55 |  | 52
Payments |  | (47) |  | (49)
Ending balance at September 30 | $ | 235 | $ | 226
Current portion, ending balance at September 30 | $ | 65 | $ | 62

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