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Accounts Payable and Accrued Expenses (Tables) | 12 Months Ended
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Dec. 31, 2025
Payables and Accruals [Abstract] |
Schedule of Accounts Payable and Accrued Liabilities | Accounts payable and accrued expenses consisted of the following:
| December 31,
| 2025 |  | 2024
| (Dollars in millions)
Trade accounts payable | $ | 205.0 |  |  | $ | 228.4 |
Accrued payroll and related benefits | 187.6 |  |  | 176.8 |
Other accrued expenses | 143.6 |  |  | 130.1 |
Asset retirement obligations | 62.1 |  |  | 55.9 |
Accrued production and sales taxes | 53.4 |  |  | 56.7 |
Accrued royalties | 50.8 |  |  | 50.7 |
Operating lease liabilities | 36.0 |  |  | 32.4 |
Accrued insurance | 27.2 |  |  | 29.8 |
Safeguard liability | 20.2 |  |  | 10.2 |
Accrued litigation reserve | 19.2 |  |  | 10.0 |
Workers’ compensation obligations | 12.0 |  |  | 11.3 |
Accrued interest | 4.4 |  |  | 4.7 |
Liabilities associated with discontinued operations | 3.5 |  |  | 4.0 |
Income taxes payable | 2.0 |  |  | 10.7 |
Accounts payable and accrued expenses | $ | 827.0 |  |  | $ | 811.7 |
Other Noncurrent Liabilities | Other noncurrent liabilities consisted of the following:
| December 31,
| 2025 |  | 2024
| (Dollars in millions)
Accrued production and sales taxes | $ | 42.8 |  |  | $ | 47.9 |
Workers’ compensation obligations | 29.5 |  |  | 26.6 |
Accrued payroll and related benefits | 21.1 |  |  | 35.7 |
Take-or-pay contracts | 17.6 |  |  | 16.4 |
Safeguard liability | 9.9 |  |  | 5.0 |
Other accrued expenses | 9.8 |  |  | 16.2 |
Pension obligations | 8.0 |  |  | 12.8 |
Liabilities associated with discontinued operations | 7.1 |  |  | 8.7 |
Other noncurrent liabilities | $ | 145.8 |  |  | $ | 169.3 |

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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 (a) carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business (accounts payable); (b) other payables; and (c) accrued liabilities. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). An alternative caption includes accrued expenses. + References No definition available. + Details
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