| Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 |
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| Cash and cash equivalents | 206 | 183 | 221 | 173 | 130 | 225 |
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| Equity securities (Note 12) | 8 | 23 | 44 | 24 | 19 | 13 |
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| Amounts receivable (Note 7) | 41 | 37 | 35 | 31 | 37 | 53 |
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| Inventory (Note 8) | 110 | 127 | 149 | 199 | 234 | 271 |
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| Income taxes receivable | - | 5 | - | 9 | - | - |
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| Other current assets | 16 | 20 | 26 | 24 | 16 | 24 |
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| Total Current Assets | 380 | 394 | 473 | 459 | 441 | 586 |
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| Property, plant and equipment | 2,813 | 2,933 | 3,101 | 3,109 | 3,174 | 3,360 |
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| Deferred tax assets | - | - | - | - | - | 9 |
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| Inventory (Note 8) | 30 | 26 | 18 | 11 | - | - |
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| Other non-current assets | 42 | 43 | 44 | 43 | 59 | 46 |
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| Total Assets | 3,265 | 3,397 | 3,637 | 3,622 | 3,674 | 4,001 |
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| Trade and other current payables | 119 | 127 | 131 | 157 | 181 | 195 |
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| Derivative liabilities (Note 12) | - | - | - | - | - | 1 |
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| Income taxes payable | - | - | 16 | - | 1 | 40 |
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| Current portion of decommissioning liabilities (Note 16) | - | - | - | - | - | 13 |
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| Total Current Liabilities | 125 | 127 | 147 | 157 | 182 | 248 |
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| Deferred tax liabilities | 492 | 514 | 560 | 623 | 661 | 704 |
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| Decommissioning liabilities (Note 16) | 45 | 57 | 75 | 103 | 108 | 124 |
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| Other non-current liabilities | 2 | 3 | 3 | 3 | 2 | 2 |
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| Total Liabilities | 663 | 701 | 785 | 886 | 953 | 1,078 |
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| Issued capital | 3,705 | 3,693 | 3,703 | 3,693 | 3,704 | 3,739 |
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| Contributed surplus | 87 | 91 | 89 | 90 | 91 | 89 |
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| Accumulated other comprehensive loss | -9 | -0 | 18 | 2 | -25 | -27 |
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| Deficit | -1,185 | -1,088 | -958 | -1,049 | -1,049 | -877 |
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| Total Equity | 2,602 | 2,695 | 2,852 | 2,736 | 2,721 | 2,924 |
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| Total Liabilities and Equity | 3,265 | 3,397 | 3,637 | 3,622 | 3,674 | 4,001 |
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