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SEGMENT INFORMATION (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of entity's operating segments [Abstract] |
Disclosure of operating segments |
| Year ended December 31, 2018
| Steel |  | Mining |  | Inter- segment eliminations |  | Total
IFRS |  |  |  |  |  |  |
Net sales | 11,453,420 |  |  | 282,000 |  |  | (280,613 | ) |  | 11,454,807 |
Cost of sales | (8,524,890 | ) |  | (239,893 | ) |  | 281,455 |  |  | (8,483,328 | )
Gross profit | 2,928,530 |  |  | 42,107 |  |  | 842 |  |  | 2,971,479 |
Selling, general and administrative expenses | (860,881 | ) |  | (15,883 | ) |  | — |  |  | (876,764 | )
Other operating income, net | 12,950 |  |  | 706 |  |  | — |  |  | 13,656 |
Operating income - IFRS | 2,080,599 |  |  | 26,930 |  |  | 842 |  |  | 2,108,371 |
Management view |  |  |  |  |  |  |
Net sales | 11,723,883 |  |  | 333,892 |  |  | (332,505 | ) |  | 11,725,270 |
Operating income | 1,768,115 |  |  | 91,418 |  |  | (6,213 | ) |  | 1,853,319 |
Reconciliation items: |  |  |  |  |  |  |
Differences in Cost of sales |  |  |  |  |  |  | 541,492 |
Effect of inflation adjustment (Note 4 (cc)) |  |  |  |  |  |  | (286,440 | )
Operating income - IFRS |  |  |  |  |  |  | 2,108,371 |
Financial income (expense), net |  |  |  |  |  |  | (179,576 | )
Equity in earnings (losses) of non-consolidated companies |  |  |  |  |  |  | 102,772 |
Income before income tax expense - IFRS |  |  |  |  |  |  | 2,031,567 |
Depreciation and amortization - IFRS | (537,885 | ) |  | (51,415 | ) |  | — |  |  | (589,299 | )
The effect of the application of IAS 29 - Hyperinflationary economies in Argentina is only allocated in the Steel segment, having an impact of $(270) million on Net sales, $(38) million in Cost of sales, $24 million in Selling, general and administrative expenses and $(3) million in Other operating expenses, net.
| Year ended December 31, 2017
| Steel |  | Mining |  | Inter- segment eliminations |  | Total
IFRS |  |  |  |  |  |  |
Net sales | 9,700,260 |  |  | 271,477 |  |  | (271,441 | ) |  | 9,700,296 |
Cost of sales | (7,465,751 | ) |  | (212,860 | ) |  | 275,586 |  |  | (7,403,025 | )
Gross profit | 2,234,509 |  |  | 58,617 |  |  | 4,145 |  |  | 2,297,271 |
Selling, general and administrative expenses | (811,487 | ) |  | (12,760 | ) |  | — |  |  | (824,247 | )
Other operating income, net | (17,011 | ) |  | 771 |  |  | — |  |  | (16,240 | )
Operating income - IFRS | 1,406,011 |  |  | 46,628 |  |  | 4,145 |  |  | 1,456,784 |
Management view |  |  |  |  |  |  |
Net sales | 9,700,260 |  |  | 287,152 |  |  | (287,116 | ) |  | 9,700,296 |
Operating income | 1,065,605 |  |  | 66,694 |  |  | (1,291 | ) |  | 1,131,008 |
Reconciliation items: |  |  |  |  |  |  |
Differences in Cost of sales |  |  |  |  |  |  | 325,776 |
Operating income - IFRS |  |  |  |  |  |  | 1,456,784 |
Financial income (expense), net |  |  |  |  |  |  | (165,090 | )
Equity in earnings (losses) of non-consolidated companies |  |  |  |  |  |  | 68,115 |
Income before income tax expense - IFRS |  |  |  |  |  |  | 1,359,809 |
Depreciation and amortization - IFRS | (424,529 | ) |  | (49,770 | ) |  | — |  |  | (474,299 | )
| Year ended December 31, 2016
| Steel |  | Mining |  | Inter- segment eliminations |  | Total
IFRS |  |  |  |  |  |  |
Net sales | 7,221,751 |  |  | 204,894 |  |  | (202,670 | ) |  | 7,223,975 |
Cost of sales | (5,391,038 | ) |  | (192,038 | ) |  | 198,686 |  |  | (5,384,390 | )
Gross profit | 1,830,713 |  |  | 12,856 |  |  | (3,984 | ) |  | 1,839,585 |
Selling, general and administrative expenses | (677,007 | ) |  | (10,935 | ) |  | — |  |  | (687,942 | )
Other operating income, net | (9,543 | ) |  | (382 | ) |  | — |  |  | (9,925 | )
Operating income - IFRS | 1,144,163 |  |  | 1,539 |  |  | (3,984 | ) |  | 1,141,718 |
Management view |  |  |  |  |  |  |
Net sales | 7,221,751 |  |  | 208,230 |  |  | (206,006 | ) |  | 7,223,975 |
Operating income | 936,164 |  |  | 3,871 |  |  | 269 |  |  | 940,303 |
Reconciliation items: |  |  |  |  |  |  |
Differences in Cost of sales |  |  |  |  |  |  | 201,415 |
Operating income - IFRS |  |  |  |  |  |  | 1,141,718 |
Financial income (expense), net |  |  |  |  |  |  | (37,885 | )
Equity in earnings (losses) of non-consolidated companies |  |  |  |  |  |  | 14,624 |
Income before income tax expense - IFRS |  |  |  |  |  |  | 1,118,457 |
Depreciation and amortization - IFRS | (361,685 | ) |  | (45,205 | ) |  | — |  |  | (406,890 | )
Disclosure of geographical areas |
| Year ended December 31, 2018
| Mexico |  | Southern region |  | Brazil and Other markets (2) |  | Total
Net sales | 6,345,137 |  |  | 1,941,168 |  |  | 3,168,502 |  |  | 11,454,807 |
Non-current assets (1) | 4,093,288 |  |  | 1,071,705 |  |  | 1,665,140 |  |  | 6,830,133 |
| Year ended December 31, 2017
| Mexico |  | Southern region |  | Brazil and Other markets (2) |  | Total
Net sales | 5,629,267 |  |  | 2,316,444 |  |  | 1,754,585 |  |  | 9,700,296 |
Non-current assets (1) | 4,042,914 |  |  | 643,411 |  |  | 1,756,007 |  |  | 6,442,332 |
| Year ended December 31, 2016
| Mexico |  | Southern region |  | Other markets |  | Total
Net sales | 4,491,761 |  |  | 1,867,622 |  |  | 864,592 |  |  | 7,223,975 |
Non-current assets (1) | 4,108,539 |  |  | 634,048 |  |  | 235,947 |  |  | 4,978,534 |
(1) Includes Property, plant and equipment and Intangible assets. (2) Includes the assets related to the business acquisition disclosed in note 3
Disclosure of products and services |
| Year ended December 31,
| 2018 |  | 2017 |  | 2016
Semi-finished (1) | 103,099 |  |  | 123,752 |  |  | 19,878 |
Slabs | 1,818,235 |  |  | 715,513 |  |  | — |
Hot rolled (2) | 3,961,144 |  |  | 3,366,697 |  |  | 2,763,403 |
Cold rolled | 1,264,940 |  |  | 1,321,663 |  |  | 1,110,671 |
Coated (3) | 3,506,040 |  |  | 3,391,328 |  |  | 2,900,009 |
Roll-formed and tubular (4) | 437,514 |  |  | 472,253 |  |  | 413,991 |
Other products (5) | 363,835 |  |  | 309,090 |  |  | 16,023 |
TOTAL SALES | 11,454,807 |  |  | 9,700,296 |  |  | 7,223,975 |
(1) | Semi-finished includes billets and round bars.
(2) | Hot rolled includes hot rolled flat products, merchant bars, reinforcing bars, stirrups and rods.
(3) | Coated includes tin plate and galvanized products.
(4) | Roll-formed and tubular includes tubes, beams, insulated panels, roofing and cladding, roof tiles, steel decks and pre-engineered metal building systems.
(5) | Other products include mainly sales of energy and pig iron.

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