| Dec 31, 2014 | Dec 31, 2015 | 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 | 35 | 42 | 26 | 25 | 22 | 27 | 103 | 260 | 257 | 281 | 241 |
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| Accounts Receivable, after Allowance for Credit Loss, Current | 167 | 81 | 92 | 150 | 163 | 78 | 63 | 101 | 79 | 113 | 91 |
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| Inventory, Net | 294 | 174 | 164 | 224 | 297 | 282 | 178 | 211 | 192 | 228 | 220 |
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| Deferred charges and prepaid expenses | 28 | 11 | 3 | 4 | 4 | 3 | 4 | 4 | 6 | 10 | 30 |
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| Other current assets | 8 | 9 | 6 | 8 | 6 | 8 | 9 | 3 | 21 | 25 | 6 |
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| Total Current Assets | 551 | 318 | 290 | 410 | 491 | 402 | 358 | 582 | 557 | 657 | 587 |
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| Property, plant and equipment, net | 772 | 769 | 742 | 707 | 674 | 626 | 570 | 510 | 486 | 493 | 507 |
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| Operating lease right-of-use assets | - | - | - | - | - | 14 | 21 | 15 | 13 | 11 | 12 |
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| Pension assets | 8 | 20 | 6 | 15 | 11 | 25 | 34 | 43 | 19 | 10 | 6 |
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| Intangible assets, net | 30 | 31 | 25 | 20 | 18 | 14 | 9 | 7 | 5 | 3 | 3 |
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| Other non-current assets | 3 | 4 | 6 | 5 | 4 | 3 | 3 | 2 | 2 | 2 | 2 |
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| Total Assets | 1,364 | 1,142 | 1,070 | 1,157 | 1,198 | 1,085 | 994 | 1,159 | 1,082 | 1,175 | 1,117 |
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| Accounts payable | 120 | 50 | 87 | 135 | 161 | 69 | 90 | 142 | 113 | 133 | 119 |
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| Salaries, wages and benefits | - | - | - | - | - | - | 29 | 38 | 21 | 27 | 17 |
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| Accrued pension and postretirement costs | 18 | 3 | 3 | 12 | 3 | 3 | 2 | 4 | 2 | 44 | 67 |
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| Current operating lease liabilities | - | - | - | - | - | 6 | 8 | 6 | 6 | 5 | 5 |
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| Current convertible notes, net | - | - | - | - | - | - | 39 | 45 | 20 | 13 | 5 |
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| Government funding liabilities | - | - | - | - | - | - | - | - | - | - | 54 |
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| Other current liabilities | 38 | 30 | 20 | 28 | 20 | 20 | 13 | 16 | 24 | 27 | 15 |
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| Total Current Liabilities | 226 | 104 | 131 | 207 | 221 | 112 | 181 | 251 | 187 | 248 | 282 |
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| Credit Agreement | - | - | - | - | - | 90 | - | - | - | - | - |
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| Operating Lease, Liability, Noncurrent | - | - | - | - | - | 8 | 14 | 9 | 7 | 6 | 7 |
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| Accrued pension and postretirement costs | 119 | 114 | 192 | 211 | 240 | 222 | 241 | 223 | 163 | 161 | 110 |
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| Deferred income taxes | - | - | - | 0 | 1 | 1 | 1 | 2 | 26 | 15 | 14 |
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| Other non-current liabilities | 11 | 10 | 13 | 13 | 12 | 10 | 11 | 10 | 14 | 13 | 13 |
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| Total Liabilities | - | - | - | - | - | 522 | 487 | 494 | 396 | 444 | 426 |
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| Preferred Stock, Value, Issued | - | - | - | - | - | - | - | - | - | - | - |
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| Common Stock, Value, Issued | - | - | - | - | - | - | - | - | - | - | - |
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| Additional paid-in capital | - | - | - | - | - | - | 843 | 832 | 847 | 844 | 844 |
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| Retained deficit | 29 | -62 | -194 | -238 | -269 | -301 | -363 | -188 | -123 | -54 | -52 |
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| Treasury shares - 2024 - 5.9 million; 2023 - 4.0 million | 35 | 46 | 45 | 37 | 33 | 25 | 13 | - | 52 | 71 | 109 |
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| Accumulated other comprehensive income (loss) | -297 | -264 | -9 | -8 | -9 | 45 | 40 | 21 | 15 | 12 | 8 |
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| Total Shareholders’ Equity | 748 | 686 | 597 | 561 | 535 | 563 | 508 | 665 | 687 | 732 | 691 |
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| Total Liabilities and Shareholders’ Equity | 1,364 | 1,142 | 1,070 | 1,157 | 1,198 | 1,085 | 994 | 1,159 | 1,082 | 1,175 | 1,117 |
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