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29. SEGMENT INFORMATION (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | R$ 30,064,020 |  | R$ 25,436,417 |  | R$ 22,968,885
Cost of sales and services | 19,124,901 |  | 17,263,264 |  | 16,105,657
Gross profit | 10,939,119 |  | 8,173,153 |  | 6,863,228
General and administrative expenses | (2,508,875) |  | (2,853,870) |  | (2,757,711)
Other operating (income) expenses, net | (2,787,562) |  | (1,903,081) |  | 2,705,335
Equity in results of affiliated companies | 124,324 | [1] | 175,524 | [1] | 135,706
Operating result before Financial Income and Taxes | 5,714,437 |  | 3,541,917 |  | 6,946,560
Domestic market [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 12,886,213 |  | 10,950,701 |  | 11,353,437
Foreign market [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 17,177,807 |  | 14,485,716 |  | 11,615,450
Asia [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 8,606,405 |  | 8,209,796 |  | 5,760,316
North America [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 922,299 |  | 767,977 |  | 1,506,041
Latin America [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 327,900 |  | 169,036 |  | 369,830
Euro [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 7,315,862 |  | 5,336,861 |  | 3,921,034
Others [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 4,346 |  | 2,046 |  | 58,229
Steel [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 16,602,895 |  | 13,949,032 |  | 15,634,143
Cost of sales and services | 14,170,692 |  | 12,962,861 |  | 12,613,216
Gross profit | 2,432,203 |  | 986,171 |  | 3,020,927
General and administrative expenses | (922,862) |  | (834,977) |  | (984,980)
Other operating (income) expenses, net | (392,061) |  | (1,055,190) |  | 1,993,790
Equity in results of affiliated companies |  |  |  |  |
Operating result before Financial Income and Taxes | 1,117,280 |  | (903,996) |  | 4,029,736
Steel [member] | Domestic market [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 11,721,339 |  | 10,027,999 |  | 10,328,372
Steel [member] | Foreign market [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 4,881,556 |  | 3,921,033 |  | 5,305,771
Steel [member] | Asia [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues |  |  | 2,980 |  | 40,681
Steel [member] | North America [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 922,299 |  | 767,977 |  | 1,506,041
Steel [member] | Latin America [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 327,900 |  | 169,036 |  | 369,830
Steel [member] | Euro [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 3,627,011 |  | 2,978,994 |  | 3,330,991
Steel [member] | Others [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 4,346 |  | 2,046 |  | 58,229
Mining [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 12,683,231 |  | 10,027,649 |  | 5,984,781
Cost of sales and services | 5,531,763 |  | 4,396,247 |  | 3,585,691
Gross profit | 7,151,468 |  | 5,631,402 |  | 2,399,091
General and administrative expenses | (179,806) |  | (186,189) |  | (144,754)
Other operating (income) expenses, net | (665,881) |  | (218,009) |  | (222,957)
Equity in results of affiliated companies |  |  |  |  |
Operating result before Financial Income and Taxes | 6,305,781 |  | 5,227,204 |  | 2,031,379
Mining [member] | Domestic market [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 1,532,589 |  | 926,836 |  | 972,360
Mining [member] | Foreign market [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 11,150,642 |  | 9,100,813 |  | 5,012,420
Mining [member] | Asia [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 7,461,791 |  | 6,742,946 |  | 4,422,377
Mining [member] | Euro [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 3,688,851 |  | 2,357,867 |  | 590,043
Logistics [member] | Port [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 256,371 |  | 240,451 |  | 266,378
Cost of sales and services | 187,860 |  | 173,344 |  | 189,999
Gross profit | 68,511 |  | 67,107 |  | 76,378
General and administrative expenses | (21,949) |  | (34,560) |  | (35,423)
Other operating (income) expenses, net | (5,420) |  | (3,860) |  | (2,469)
Equity in results of affiliated companies |  |  |  |  |
Operating result before Financial Income and Taxes | 41,142 |  | 28,687 |  | 38,486
Logistics [member] | Port [member] | Domestic market [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 256,371 |  | 240,451 |  | 266,378
Logistics [member] | Railroads [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 1,489,647 |  | 1,321,355 |  | 1,506,114
Cost of sales and services | 1,094,130 |  | 1,030,210 |  | 1,049,071
Gross profit | 395,517 |  | 291,145 |  | 457,043
General and administrative expenses | (114,970) |  | (109,770) |  | (106,412)
Other operating (income) expenses, net | 52,569 |  | 147,155 |  | (34,911)
Equity in results of affiliated companies |  |  |  |  |
Operating result before Financial Income and Taxes | 333,116 |  | 328,530 |  | 315,721
Logistics [member] | Railroads [member] | Domestic market [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 1,489,647 |  | 1,321,355 |  | 1,506,114
Energy [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 172,859 |  | 325,343 |  | 410,606
Cost of sales and services | 128,227 |  | 266,754 |  | 286,734
Gross profit | 44,632 |  | 58,589 |  | 123,872
General and administrative expenses | (30,243) |  | (29,034) |  | (27,948)
Other operating (income) expenses, net | (2,967) |  | (1,486) |  | (387)
Equity in results of affiliated companies |  |  |  |  |
Operating result before Financial Income and Taxes | 11,422 |  | 28,069 |  | 95,537
Energy [member] | Domestic market [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 172,859 |  | 325,343 |  | 410,606
Cement [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 858,192 |  | 570,805 |  | 588,230
Cost of sales and services | 647,132 |  | 607,719 |  | 544,266
Gross profit | 211,060 |  | (36,914) |  | 43,965
General and administrative expenses | (88,232) |  | (91,466) |  | (95,893)
Other operating (income) expenses, net | (44,893) |  | (40,630) |  | 299
Equity in results of affiliated companies |  |  |  |  |
Operating result before Financial Income and Taxes | 77,935 |  | (169,010) |  | (51,628)
Cement [member] | Domestic market [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 857,197 |  | 570,805 |  | 588,230
Cement [member] | Foreign market [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 995 |  |  |  |
Cement [member] | Latin America [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 995 |  |  |  |
Corporate expenses/elimination [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | (1,999,175) |  | (998,218) |  | (1,421,366)
Cost of sales and services | (2,634,903) |  | (2,173,871) |  | (2,163,321)
Gross profit | 635,728 |  | 1,175,653 |  | 741,956
General and administrative expenses | (1,150,813) |  | (1,567,874) |  | (1,362,302)
Other operating (income) expenses, net | (1,728,909) |  | (731,061) |  | 971,970
Equity in results of affiliated companies | 71,755 |  | 125,715 |  | 135,706
Operating result before Financial Income and Taxes | (2,172,239) |  | (997,567) |  | 487,330
Corporate expenses/elimination [member] | Domestic market [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | (3,143,789) |  | (2,462,088) |  | (2,718,623)
Corporate expenses/elimination [member] | Foreign market [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | 1,144,614 |  | 1,463,870 |  | 1,297,258
Corporate expenses/elimination [member] | Asia [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Net revenues | R$ 1,144,614 |  | R$ 1,463,870 |  | R$ 1,297,258
[1] | The table below shows the reconciliation of the equity in results of affiliated companies classified as joint venture and associates and the amount disclosed in the income statement and it is due to the elimination of the results of the CSN's transactions with these companies.

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