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Note 12 - Investments in Non-consolidated Companies - Summary of Selected Financial Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Statement Line Items [Line Items] |  |  |
Non-current assets | $ 9,172,384 | $ 8,787,107 |
Current assets | 5,670,607 | 5,464,192 |
Total assets | 14,842,991 | 14,251,299 | $ 14,398,218
Non-current liabilities | 876,162 | 657,444 |
Current liabilities | 1,780,457 | 1,718,363 |
Total liabilities | 2,656,619 | 2,375,807 |
Non-controlling interests | 197,414 | 92,610 |
Revenues | 7,294,055 | 7,658,588 | 5,288,504
Gross profit | 2,186,560 | 2,379,288 | 1,603,447
Net income for the year attributable to owners of the parent | 742,686 | 876,063 | 544,737
Total comprehensive income for the year, net of tax, attributable to owners of the parent | 690,095 | 776,713 | $ 683,531
Ternium S.A. [member] |  |  |
Statement Line Items [Line Items] |  |  |
Non-current assets | 8,757,320 | 8,121,824 |
Current assets | 4,178,213 | 4,426,038 |
Total assets | 12,935,533 | 12,547,862 |
Non-current liabilities | 3,452,535 | 3,236,756 |
Current liabilities | 1,768,125 | 1,826,530 |
Total liabilities | 5,220,660 | 5,063,286 |
Non-controlling interests | 1,103,208 | 1,091,321 |
Revenues | 10,192,818 | 11,454,807 |
Gross profit | 1,740,378 | 2,971,479 |
Net income for the year attributable to owners of the parent | 564,269 | 1,506,647 |
Total comprehensive income for the year, net of tax, attributable to owners of the parent | 445,473 | 1,176,964 |
Usiminas [member] |  |  |
Statement Line Items [Line Items] |  |  |
Non-current assets | 4,335,662 | 4,696,896 |
Current assets | 2,198,449 | 2,148,322 |
Total assets | 6,534,111 | 6,845,218 |
Non-current liabilities | 1,955,395 | 1,933,207 |
Current liabilities | 716,930 | 860,862 |
Total liabilities | 2,672,325 | 2,794,069 |
Non-controlling interests | 377,667 | 369,333 |
Revenues | 3,790,206 | 3,766,241 |
Gross profit | 478,141 | 612,156 |
Net income for the year attributable to owners of the parent | $ 52,779 | $ 194,381 |

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