| Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Cash and cash equivalents | 14 | 55 | 10 | 7 | 11 | 15 | 31 | 30 | 20 |
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| Accounts and other receivables – net | 132 | 196 | 160 | 107 | 124 | 178 | 175 | 165 | 146 |
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| Inventory, Net | 129 | 129 | 137 | 172 | 180 | 150 | 216 | 212 | 212 |
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| Taxes receivable | - | - | - | - | 12 | 1 | 10 | 1 | 1 |
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| Other current assets | 8 | 7 | 4 | 5 | 7 | 6 | 9 | 11 | 9 |
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| Total current assets | 283 | 388 | 311 | 291 | 334 | 350 | 441 | 420 | 387 |
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| Property, plant and equipment – net | - | - | - | - | - | 768 | 811 | 853 | 918 |
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| Operating lease right-of-use assets | - | - | - | 136 | 114 | 136 | 115 | 96 | 153 |
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| Goodwill | 15 | 15 | 15 | 15 | 15 | 18 | 56 | 56 | 56 |
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| Intangible assets | - | - | - | - | - | - | 49 | 46 | 43 |
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| Other assets | 32 | 35 | 36 | 39 | 35 | 40 | 23 | 25 | 37 |
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| Total assets | 905 | 1,050 | 1,035 | 1,236 | 1,263 | 1,312 | 1,495 | 1,496 | 1,595 |
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| Accounts payable | 223 | 228 | 230 | 206 | 190 | 221 | 273 | 259 | 229 |
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| Accrued liabilities | 25 | 35 | 30 | 28 | 41 | 50 | 49 | 44 | 47 |
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| Operating Lease, Liability, Current | - | - | - | 38 | 29 | 36 | 37 | 32 | 42 |
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| Income taxes payable | - | 0 | 2 | - | - | - | - | 8 | 1 |
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| Deferred income and customer advances | - | - | 23 | 20 | 26 | 3 | 34 | 16 | 38 |
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| Total current liabilities | 274 | 297 | 285 | 292 | 287 | 310 | 393 | 359 | 357 |
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| Deferred income taxes | - | - | 104 | 110 | 126 | 133 | 160 | 151 | 145 |
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| Operating Lease, Liability, Noncurrent | - | - | - | 98 | 86 | 101 | 78 | 64 | 111 |
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| Line of credit – long-term | - | - | 200 | 297 | 275 | 135 | 115 | 170 | 195 |
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| Postretirement benefit obligations | 34 | 33 | 21 | 32 | 39 | 18 | - | 4 | - |
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| Other liabilities | 3 | 3 | 5 | 6 | 7 | 14 | 11 | 9 | 11 |
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| Total liabilities | 690 | 674 | 614 | 835 | 819 | 711 | 757 | 757 | 820 |
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| Common Stock, Value, Issued | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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| Preferred Stock, Value, Issued | - | - | - | - | - | - | - | - | - |
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| Treasury stock at par (6,252,129 shares at December 31, 2024; 5,848,475 shares at December 31, 2023) | - | - | - | - | - | - | - | 0 | 0 |
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| Additional paid-in capital | 243 | 263 | 235 | 181 | 185 | 196 | 175 | 138 | 137 |
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| Retained earnings | -25 | 122 | 188 | 229 | 275 | 412 | 568 | 605 | 632 |
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| Accumulated other comprehensive income (loss) | -3 | -9 | -2 | -9 | -16 | -7 | -4 | -4 | 6 |
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| Total stockholders' equity | 215 | 376 | 420 | 401 | 444 | 601 | 738 | 739 | 775 |
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| Total liabilities and stockholders' equity | 905 | 1,050 | 1,035 | 1,236 | 1,263 | 1,312 | 1,495 | 1,496 | 1,595 |
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