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26. SEGMENT INFORMATION (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of operating segments [line items] |  |  |
Net revenues | R$ 22,968,885 | R$ 18,524,601 | R$ 17,148,949
Cost of sales and services | (16,105,657) | (13,596,141) | (12,640,042)
Gross profit | 6,863,228 | 4,928,460 | 4,508,907
General and administrative expenses | (2,757,711) | (2,230,948) | (2,215,128)
Depreciation | 1,175,107 | 1,408,765 | 1,278,816
Proportionate EBITDA of joint ventures | 568,045 | 538,170 | 502,345
Adjusted EBITDA | 5,848,669 | 4,644,447 | 4,074,940
Domestic market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | 11,353,437 | 8,706,466 | 7,729,913
Foreign market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | R$ 11,615,448 | R$ 9,818,135 | R$ 9,419,036
Steel |  |  |
Disclosure of operating segments [line items] |  |  |
Metric tons (Thou.) | 5,068,758 | 4921719 | 4,857,174
Net revenues | R$ 15,634,143 | R$ 12,959,023 | R$ 11,515,908
Cost of sales and services | 12,613,216 | (10,537,547) | 9,393,237
Gross profit | 3,020,927 | 2,421,476 | 2,122,671
General and administrative expenses | (984,980) | (963,822) | (914,927)
Depreciation | 609,274 | 658,587 | 679,074
Adjusted EBITDA | 2,645,221 | 2,116,241 | 1,886,818
Steel | Domestic market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | 10,328,372 | 7,818,552 | 6,980,087
Steel | Foreign market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | R$ 5,305,771 | R$ 5,140,471 | R$ 4,535,821
Mining |  |  |
Disclosure of operating segments [line items] |  |  |
Metric tons (Thou.) | 34,780,756 | 32576843 | 36,983,297
Net revenues | R$ 5,984,781 | R$ 4,620,971 | R$ 4,581,903
Cost of sales and services | 3,585,691 | (3,005,840) | 3,099,236
Gross profit | 2,399,090 | 1,615,131 | 1,482,667
General and administrative expenses | (144,754) | (158,958) | (185,149)
Depreciation | 366,547 | 490,805 | 461,287
Adjusted EBITDA | 2,620,883 | 1,946,978 | 1,758,805
Mining | Domestic market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | 972,360 | 829,268 | 542,028
Mining | Foreign market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | 5,012,421 | 3,791,703 | 4,039,875
Port |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | 266,378 | 238,240 | 207,722
Cost of sales and services | 189,999 | (156,997) | 141,542
Gross profit | 76,379 | 81,243 | 66,180
General and administrative expenses | (35,423) | (27,943) | (25,180)
Depreciation | 20,368 | 15,752 | 13,430
Adjusted EBITDA | 61,324 | 69,052 | 54,430
Port | Domestic market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | 266,378 | 238,240 | 207,722
Port | Foreign market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues |  |  |
Railroads |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | 1,506,114 | 1,416,612 | 1,319,907
Cost of sales and services | 1,049,071 | (1,024,696) | 914,361
Gross profit | 457,043 | 391,916 | 405,546
General and administrative expenses | (106,412) | (94,921) | (83,020)
Depreciation | 258,985 | 294,571 | 227,792
Adjusted EBITDA | 609,616 | 591,566 | 550,318
Railroads | Domestic market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | 1,506,114 | 1,416,612 | 1,319,907
Railroads | Foreign market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues |  |  |
Energy |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | 410,606 | 407,671 | 269,095
Cost of sales and services | 286,734 | (285,085) | 195,994
Gross profit | 123,872 | 122,586 | 73,101
General and administrative expenses | (27,948) | (27,098) | (25,196)
Depreciation | 17,285 | 17,265 | 17,140
Adjusted EBITDA | 113,209 | 112,753 | 65,045
Energy | Domestic market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | 410,606 | 407,671 | 269,095
Energy | Foreign market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues |  |  |
Cement |  |  |
Disclosure of operating segments [line items] |  |  |
Metric tons (Thou.) |  | 3,313,061 |
Net revenues | 588,230 | R$ 487,129 | 490,608
Cost of sales and services | 544,266 | (512,762) | 467,373
Gross profit | 43,964 | (25,633) | 23,235
General and administrative expenses | (95,893) | (80,823) | (74,528)
Depreciation | 115,411 | 121,801 | 73,030
Adjusted EBITDA | 63,482 | 15,345 | 21,737
Cement | Domestic market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | 588,230 | 487,129 | R$ 490,608
Cement | Foreign market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues |  |  |
Corporate expenses/elimination |  |  |
Disclosure of operating segments [line items] |  |  |
Metric tons (Thou.) |  | (5,359,571) | (4,062,774)
Net revenues | (1,421,367) | R$ (1,605,045) | R$ (1,236,194)
Cost of sales and services | (2,163,320) | 1,926,786 | (1,571,701)
Gross profit | 741,953 | 321,741 | 335,507
General and administrative expenses | (1,362,301) | (877,383) | (907,128)
Depreciation | (212,763) | (190,016) | (192,937)
Proportionate EBITDA of joint ventures | 568,045 | 538,170 | 502,345
Adjusted EBITDA | (265,066) | (207,488) | (262,213)
Corporate expenses/elimination | Domestic market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | (2,718,623) | (2,491,006) | (2,079,534)
Corporate expenses/elimination | Foreign market |  |  |
Disclosure of operating segments [line items] |  |  |
Net revenues | R$ 1,297,256 | R$ 885,961 | R$ 843,340

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