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Casualty, Environmental and Other Reserves (Tables) | 3 Months Ended
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Mar. 31, 2024
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, 2024 |  | December 31, 2023
(Dollars in Millions) | Current | Long-term | Total |  | Current | Long-term | Total
Casualty: |  |  |  |  |  |  |
Personal Injury | $ | 45 |  | $ | 87 |  | $ | 132 |  |  | $ | 45 |  | $ | 83 |  | $ | 128 |
Occupational | 7 |  | 62 |  | 69 |  |  | 7 |  | 60 |  | 67 |
Total Casualty | 52 |  | 149 |  | 201 |  |  | 52 |  | 143 |  | 195 |
Environmental | 41 |  | 113 |  | 154 |  |  | 41 |  | 113 |  | 154 |
Other | 47 |  | 46 |  | 93 |  |  | 51 |  | 40 |  | 91 |
Total | $ | 140 |  | $ | 308 |  | $ | 448 |  |  | $ | 144 |  | $ | 296 |  | $ | 440 |

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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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