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Other Noncurrent Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2023
Other Liabilities Disclosure [Abstract] |
Other Noncurrent Liabilities | Other non-current liabilities consisted of the following:
| December 31, 2023 |  | December 31, 2022
Asset retirement obligations | $ | 84 |  |  | $ | 81 |
Accrued environmental expense, long-term | 12 |  |  | 12 |
Other | 20 |  |  | 18 |
Other non-current liabilities | $ | 116 |  |  | $ | 111 |
Schedule of Change in Asset Retirement Obligation | Changes in the carrying amount of asset retirement obligations for the years ended December 31, 2023 and 2022 were as follows:
| Year Ended December 31,
| 2023 |  | 2022
Balance at beginning of year | $ | 81 |  |  | $ | 79 |
Liabilities incurred | — |  |  | — |
Liabilities settled | (1) |  |  | (2) |
Accretion expense | 4 |  |  | 4 |
Balance at end of year | $ | 84 |  |  | $ | 81 |

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- Definition Tabular disclosure of other noncurrent liabilities. + References No definition available. + Details
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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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