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Casualty, Environmental and Other Reserves - Balance Sheet Presentation (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Contingencies [Line Items] |  |  |  |
Current | $ 144 | $ 118 |  |
Long-term | 292 | 250 |  |
Total | 436 | 368 | $ 314 | $ 305
Casualty |  |  |  |
Contingencies [Line Items] |  |  |  |
Current | 50 | 44 |  |
Long-term | 144 | 136 |  |
Total | 194 | 180 | 196 | 187
Personal Injury |  |  |  |
Contingencies [Line Items] |  |  |  |
Current | 40 | 37 |  |
Long-term | 86 | 81 |  |
Total | 126 | 118 |  |
Occupational |  |  |  |
Contingencies [Line Items] |  |  |  |
Current | 10 | 7 |  |
Long-term | 58 | 55 |  |
Total | 68 | 62 |  |
Environmental |  |  |  |
Contingencies [Line Items] |  |  |  |
Current | 53 | 37 |  |
Long-term | 108 | 71 |  |
Total | 161 | 108 | 76 | 74
Other |  |  |  |
Contingencies [Line Items] |  |  |  |
Current | 41 | 37 |  |
Long-term | 40 | 43 |  |
Total | $ 81 | $ 80 | $ 42 | $ 44

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