| Dec 31,
2019 | Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 | Dec 31,
2023 |
|---|
| Cash and deposits | - | 989 | 937 | 634 | 899 |
|---|
| Accounts receivable - trade and contract assets | - | - | - | 783 | 1,016 |
|---|
| Supplies | - | 11 | 18 | 39 | 28 |
|---|
| Advance payments to suppliers | - | 0 | 0 | 1 | 1 |
|---|
| Prepaid expenses | - | 11 | 11 | 29 | 23 |
|---|
| Accounts receivable - other | - | 253 | 0 | 1 | 13 |
|---|
| Other | - | 1 | 1 | 2 | 3 |
|---|
| Allowance for doubtful accounts | - | -0 | -0 | -0 | -0 |
|---|
| Current assets | - | 1,924 | 1,604 | 1,488 | 1,982 |
|---|
| Buildings, net | - | 275 | 263 | 284 | 600 |
|---|
| Structures, net | - | 2 | 2 | 1 | 134 |
|---|
| Machinery and equipment, net | - | 9 | 6 | 4 | 3 |
|---|
| Vehicles, net | - | 1 | 0 | 0 | - |
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| Tools, furniture and fixtures, net | - | 10 | 9 | 22 | 44 |
|---|
| Land | - | 187 | 191 | 192 | 222 |
|---|
| Construction in progress | - | - | 47 | 359 | - |
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| Property, plant and equipment | - | 483 | 518 | 863 | 1,003 |
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| Software | - | 12 | 12 | 16 | 12 |
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| Other | - | 3 | 1 | 3 | 4 |
|---|
| Intangible assets | - | 15 | 13 | 19 | 16 |
|---|
| Investment securities | - | 197 | 322 | 330 | 298 |
|---|
| Shares of subsidiaries and associates | - | - | 3 | 3 | 3 |
|---|
| Investments in capital | - | 6 | 6 | 6 | - |
|---|
| Long-term prepaid expenses | - | 1 | 1 | 1 | 2 |
|---|
| Other | - | 142 | 112 | 77 | 79 |
|---|
| Investments and other assets | - | 346 | 444 | 417 | 382 |
|---|
| Non-current assets | - | 844 | 975 | 1,299 | 1,401 |
|---|
| Assets | - | 2,768 | 2,579 | 2,787 | 3,383 |
|---|
| Accounts payable - trade | - | 200 | 177 | 117 | 158 |
|---|
| Current portion of bonds payable | - | 146 | 130 | 265 | 50 |
|---|
| Current portion of long-term borrowings | - | 408 | 149 | 200 | 362 |
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| Accounts payable - other | - | 32 | 81 | 64 | 64 |
|---|
| Accrued expenses | - | 81 | 93 | 95 | 99 |
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| Income taxes payable | - | 20 | 28 | 117 | 102 |
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| Advances received | - | 1 | 1 | 1 | 1 |
|---|
| Provision for loss on orders received | - | 1 | 1 | 0 | 0 |
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| Other | - | 175 | 204 | 199 | 145 |
|---|
| Current liabilities | - | 1,078 | 875 | 1,059 | 981 |
|---|
| Bonds payable | - | 445 | 315 | 50 | - |
|---|
| Long-term borrowings | - | 372 | 336 | 387 | 482 |
|---|
| Deferred tax liabilities | - | 18 | 53 | 55 | 43 |
|---|
| Asset retirement obligations | - | 20 | 9 | 27 | 34 |
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| Other | - | 48 | 46 | 46 | 46 |
|---|
| Non-current liabilities | - | 902 | 759 | 565 | 605 |
|---|
| Liabilities | - | 1,980 | 1,634 | 1,624 | 1,585 |
|---|
| Share capital | - | 140 | 140 | 140 | 298 |
|---|
| Legal capital surplus | - | 128 | 128 | 128 | 286 |
|---|
| Capital surplus | - | 128 | 128 | 128 | 286 |
|---|
| Retained earnings brought forward | - | 416 | 488 | 702 | 1,045 |
|---|
| Retained earnings | - | 416 | 488 | 702 | 1,045 |
|---|
| Shareholders' equity | - | 683 | 756 | 970 | 1,629 |
|---|
| Valuation difference on available-for-sale securities | - | 104 | 189 | 193 | 168 |
|---|
| Valuation and translation adjustments | - | 104 | 189 | 193 | 168 |
|---|
| Net assets | 652 | 788 | 945 | 1,163 | 1,797 |
|---|
| Liabilities and net assets | - | 2,768 | 2,579 | 2,787 | 3,383 |
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