| Dec 31, 2012 | Dec 31, 2013 | 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 |
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Cash and deposits | - | 249 | 830 | 510 | 456 | 537 | 513 | 561 | 408 | 591 | 1,122 |
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Accounts receivable - trade | - | 336 | 512 | 541 | 352 | 319 | 315 | 264 | 334 | 555 | - |
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Notes and accounts receivable - trade, and contract assets | - | - | - | - | - | - | - | - | - | - | 782 |
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Prepaid expenses | - | 15 | 28 | 14 | 23 | 37 | 26 | 37 | 26 | 57 | 74 |
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Other | - | 2 | 1 | 5 | 1 | - | 3 | 2 | 9 | 37 | 113 |
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Allowance for doubtful accounts | - | -8 | -8 | -7 | -3 | -1 | - | -5 | -3 | -5 | -4 |
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Prepaid expenses | - | 15 | 28 | 14 | 23 | 37 | 26 | 37 | 26 | 57 | 74 |
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Current assets | - | 603 | 1,376 | 1,572 | 1,091 | 1,196 | 971 | 1,059 | 973 | 1,234 | 2,088 |
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Other | - | 2 | 1 | 5 | 1 | - | 3 | 2 | 9 | 37 | 113 |
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Allowance for doubtful accounts | - | -8 | -8 | -7 | -3 | -1 | - | -5 | -3 | -5 | -4 |
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Current assets | - | 603 | 1,376 | 1,572 | 1,091 | 1,196 | 971 | 1,059 | 973 | 1,234 | 2,088 |
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Facilities attached to buildings | - | 3 | 3 | 3 | 11 | 10 | 13 | 18 | 23 | 24 | 23 |
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Accumulated depreciation | - | -0 | -1 | -1 | -4 | -3 | -5 | -7 | -14 | -3 | -4 |
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Facilities attached to buildings, net | - | 2 | 2 | 2 | 7 | 7 | 8 | 11 | 9 | 21 | 18 |
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Tools, furniture and fixtures | - | 6 | 4 | 5 | 8 | 8 | 11 | 12 | 12 | 14 | 15 |
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Accumulated depreciation | - | -5 | -2 | -3 | -5 | -7 | -8 | -10 | -10 | -10 | -12 |
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Tools, furniture and fixtures, net | - | 1 | 2 | 2 | 3 | 1 | 3 | 2 | 1 | 3 | 2 |
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Property, plant and equipment | - | 3 | 4 | 4 | 10 | 9 | 11 | 13 | 10 | 25 | 21 |
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Telephone subscription right | - | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
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Software | - | 3 | 9 | 10 | 1 | 0 | 1 | 1 | 14 | 291 | 27 |
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Intangible assets | - | 5 | 10 | 10 | 1 | 0 | 1 | 1 | 136 | 348 | 27 |
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Software in progress | - | - | - | - | - | - | - | - | 122 | 57 | - |
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Intangible assets | - | 5 | 10 | 10 | 1 | 0 | 1 | 1 | 136 | 348 | 27 |
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Shares of subsidiaries and associates | - | - | - | - | - | 1 | 1 | - | - | - | - |
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Investment securities | - | - | - | 30 | 79 | 75 | 77 | 105 | 80 | 81 | 35 |
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Investment securities | - | - | - | 30 | 79 | 75 | 77 | 105 | 80 | 81 | 35 |
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Shares of subsidiaries and associates | - | - | - | - | - | 1 | 1 | - | - | - | - |
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Leasehold deposits | - | 16 | 20 | 20 | 27 | 37 | 37 | 29 | 31 | 36 | 35 |
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Deferred tax assets | - | - | - | - | - | - | - | - | - | - | 24 |
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Deferred tax assets | - | - | - | - | - | - | - | - | - | - | 24 |
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Leasehold deposits | - | 16 | 20 | 20 | 27 | 37 | 37 | 29 | 31 | 36 | 35 |
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Other | - | 3 | 3 | 4 | 4 | 5 | 5 | 6 | - | - | - |
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Other | - | 3 | 3 | 4 | 4 | 5 | 5 | 6 | - | - | - |
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Investments and other assets | - | 22 | 26 | 56 | 130 | 134 | 122 | 140 | 111 | 116 | 96 |
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Investments and other assets | - | 22 | 26 | 56 | 130 | 134 | 122 | 140 | 111 | 116 | 96 |
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Non-current assets | - | 31 | 40 | 70 | 141 | 143 | 134 | 154 | 257 | 489 | 145 |
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Assets | - | 633 | 1,416 | 1,642 | 1,232 | 1,339 | 1,104 | 1,213 | 1,231 | 1,723 | 2,233 |
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Accounts payable - trade | - | 245 | 302 | 324 | 224 | 215 | 286 | 224 | 248 | 391 | 618 |
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Accounts payable - other | - | 99 | 116 | 112 | 87 | 101 | 95 | 85 | 152 | 472 | 420 |
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Current portion of long-term borrowings | - | - | - | - | - | - | - | - | - | - | 70 |
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Short-term borrowings from subsidiaries and associates | - | - | - | - | - | - | - | - | - | 120 | - |
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Income taxes payable | - | 47 | 77 | 85 | - | 47 | - | 34 | - | 39 | - |
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Income taxes payable | - | 47 | 77 | 85 | - | 47 | - | 34 | - | 39 | - |
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Advances received | - | 5 | 6 | 28 | 38 | 36 | 14 | 7 | 21 | 92 | - |
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Contract liabilities | - | - | - | - | - | - | - | - | - | - | 401 |
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Short-term borrowings from subsidiaries and associates | - | - | - | - | - | - | - | - | - | 120 | - |
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Advances received | - | 5 | 6 | 28 | 38 | 36 | 14 | 7 | 21 | 92 | - |
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Contract liabilities | - | - | - | - | - | - | - | - | - | - | 401 |
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Other | - | 1 | 5 | 1 | 1 | 1 | 12 | 21 | 24 | 23 | 21 |
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Current portion of long-term borrowings | - | - | - | - | - | - | - | - | - | - | 70 |
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Other | - | 1 | 5 | 1 | 1 | 1 | 12 | 21 | 24 | 23 | 21 |
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Current liabilities | - | 421 | 564 | 627 | 383 | 439 | 407 | 372 | 446 | 1,137 | 1,532 |
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Current liabilities | - | 421 | 564 | 627 | 383 | 439 | 407 | 372 | 446 | 1,137 | 1,532 |
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Deferred tax liabilities | - | - | - | - | - | - | - | 5 | 4 | 0 | - |
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Long-term borrowings | - | - | - | - | - | - | - | - | - | - | 280 |
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Asset retirement obligations | - | 1 | 1 | 1 | 2 | 4 | 4 | 4 | 10 | 12 | 11 |
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Long-term borrowings from subsidiaries and associates | - | - | - | - | - | - | - | - | - | 90 | - |
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Long-term borrowings from subsidiaries and associates | - | - | - | - | - | - | - | - | - | 90 | - |
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Deferred tax liabilities | - | - | - | - | - | - | - | 5 | 4 | 0 | - |
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Long-term borrowings | - | - | - | - | - | - | - | - | - | - | 280 |
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Asset retirement obligations | - | 1 | 1 | 1 | 2 | 4 | 4 | 4 | 10 | 12 | 11 |
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Other | - | - | - | - | - | - | - | - | - | - | 16 |
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Non-current liabilities | - | 1 | 1 | 1 | 2 | 4 | 5 | 10 | 13 | 102 | 308 |
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Liabilities | - | 422 | 564 | 628 | 385 | 443 | 412 | 382 | 459 | 1,239 | 1,840 |
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Share capital | - | 10 | 277 | 277 | 278 | 278 | 278 | 278 | 278 | 278 | 100 |
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Legal capital surplus | - | - | 267 | 267 | 268 | 268 | 268 | 268 | - | - | - |
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Capital surplus | - | - | 267 | 267 | 268 | 268 | 268 | 268 | 268 | 268 | 995 |
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Capital surplus | - | - | 267 | 267 | 268 | 268 | 268 | 268 | 268 | 268 | 995 |
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Legal retained earnings | - | 3 | 3 | 8 | 8 | 8 | 8 | 8 | - | - | - |
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Retained earnings brought forward | - | 199 | 305 | 462 | 393 | 441 | 232 | 370 | - | - | - |
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Retained earnings | - | 202 | 308 | 471 | 401 | 449 | 240 | 378 | 320 | 32 | -609 |
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Retained earnings | - | 202 | 308 | 471 | 401 | 449 | 240 | 378 | 320 | 32 | -609 |
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Treasury shares | - | - | - | - | -100 | -100 | -100 | -100 | -100 | -100 | -100 |
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Shareholders' equity | - | 212 | 851 | 1,014 | 846 | 894 | 686 | 823 | 765 | 476 | 385 |
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Valuation difference on available-for-sale securities | - | - | - | -1 | -0 | 2 | 6 | 9 | 7 | 8 | 7 |
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Valuation and translation adjustments | - | - | - | -1 | -0 | 2 | 6 | 9 | 7 | 8 | 7 |
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Net assets | 134 | 212 | 851 | 1,013 | 846 | 896 | 691 | 832 | 772 | 484 | 392 |
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Liabilities and net assets | - | 633 | 1,416 | 1,642 | 1,232 | 1,339 | 1,104 | 1,213 | 1,231 | 1,723 | 2,233 |
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