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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2024
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Changes in Asset Retirement Obligation | The following table documents the changes in the Company’s asset retirement obligation during the years ended December 31 (dollars in millions):
|  | 2024 |  |  | 2023 |  |  | 2022 |
Asset retirement obligation at beginning of year |  | $ | 18 |  |  | $ | 16 |  |  | $ | 17 |
Liabilities incurred |  |  | — |  |  |  | 2 |  |  |  | — |
Liabilities settled |  |  | (1 | ) |  |  | — |  |  |  | (2 | )
Accretion expense |  |  | 1 |  |  |  | — |  |  |  | 1 |
Asset retirement obligation at end of year |  | $ | 18 |  |  | $ | 18 |  |  | $ | 16 |

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
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