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Casualty, Environmental and Other Reserves (Tables) | 3 Months Ended
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Mar. 31, 2025
Casualty, Environmental and Other Reserves [Abstract] |
Schedule of Casualty, Environmental and Other Reserves | Casualty, environmental and other reserves are provided for in the consolidated balance sheets as shown in the table below.
| March 31, 2025 |  | December 31, 2024
(Dollars in Millions) | Current | Long-term | Total |  | Current | Long-term | Total
Casualty: |  |  |  |  |  |  |
Personal Injury | $ | 51 |  | $ | 93 |  | $ | 144 |  |  | $ | 51 |  | $ | 91 |  | $ | 142 |
Occupational | 7 |  | 59 |  | 66 |  |  | 7 |  | 59 |  | 66 |
Total Casualty | 58 |  | 152 |  | 210 |  |  | 58 |  | 150 |  | 208 |
Environmental | 37 |  | 114 |  | 151 |  |  | 37 |  | 114 |  | 151 |
Other | 51 |  | 53 |  | 104 |  |  | 54 |  | 49 |  | 103 |
Total | $ | 146 |  | $ | 319 |  | $ | 465 |  |  | $ | 149 |  | $ | 313 |  | $ | 462 |

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- Definition Tabular disclosure of the loss contingencies that were reported in the period or disclosed as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-9 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-3 + Details
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