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Casualty, Environmental and Other Reserves (Tables) | 9 Months Ended
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Sep. 30, 2018
Casualty, Environmental and Other Reserves [Abstract] |
Schedule of Casualty, Environmental and Other Reserves | Personal injury and environmental reserves are considered critical accounting estimates due to the need for significant management judgment. Casualty, environmental and other reserves are provided for in the consolidated balance sheets as shown in the table below.
| September 30, 2018 |  | December 31, 2017
(Dollars in millions) | Current | Long-term | Total |  | Current | Long-term | Total
Casualty: |  |  |  |  |  |  |
Personal Injury | $ | 42 |  | $ | 108 |  | $ | 150 |  |  | $ | 43 |  | $ | 125 |  | $ | 168 |
Occupational | 7 |  | 47 |  | 54 |  |  | 6 |  | 54 |  | 60 |
Total Casualty | 49 |  | 155 |  | 204 |  |  | 49 |  | 179 |  | 228 |
Environmental | 37 |  | 52 |  | 89 |  |  | 31 |  | 59 |  | 90 |
Other | 24 |  | 24 |  | 48 |  |  | 28 |  | 28 |  | 56 |
Total | $ | 110 |  | $ | 231 |  | $ | 341 |  |  | $ | 108 |  | $ | 266 |  | $ | 374 |

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