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24. OTHER OPERATING INCOME (EXPENSES) (Details) - BRL (R$) R$ in Thousands | 12 Months Ended | 24 Months Ended
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2017
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating income | R$ 4,036,043 | R$ 824,286 | R$ 663,509 |
Other operating expenses | (1,330,706) | (646,944) | (1,076,730) |
Other operating income (expenses), net | 2,705,337 | 177,342 | (413,221) |
Taxes and fees |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (26,197) | (136,348) | (88,249) |
Write-off / (Provision) of judicial deposits |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (54,330) | (38,258) | (64,886) |
Expenses with environmental liabilities, net |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (60,311) | (7,156) | (5,023) |
Expenses from tax, social security, labor, civil and environmental law suits |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (59,219) | (95,744) |  |
Contractual fines |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (104,086) |  |  |
Depreciation of unused equipment and amortization of intangible assets |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (97,914) | (44,570) | (43,681) |
Write off of PP&E and Intangible assets |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (27,260) | (28,127) | (88,339) |
Losses /reversals estimated in inventories |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (149,704) | (12,903) | (29,316) |
Losses on spare parts |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses |  | (2,872) |  |
Studies and project engineering expenses |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (33,738) | (32,956) | (31,156) |
Research and development expenses |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (2,688) | (3,944) |  | R$ (2,269)
Advisory expenses |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (508) | (3,419) | (20,865) |
Healthcare plan expenses |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (108,369) | (97,837) | (80,489) |
Provisions/(Provision) for industrial restructuring |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (17,490) | 5,807 | 96,390 |
Hedge cash flow realized |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (370,191) | (92,140) | (77,444) |
Impairment of fair value of Transnordestina |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses |  |  | (387,989) |
Other expenses |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating expenses | (218,701) | (56,477) | (85,256) |
Indemnities/gains on lawsuits |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating income | 46,256 | 6,106 | 26,871 |
Rentals and leases |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating income | 5,430 | 1,841 | 1,483 |
Dividends received |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating income | 9,188 | 3,248 | 567 |
Extemporaneous PIS/COFINS credits |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating income | 1,102,365 |  | 203,504 |
Contractual fines |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating income | 3,965 | 2,970 | 2,501 |
Gain on business combination |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating income |  |  | 66,496 |
Actuarial pension plan |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating income | 20,983 | 36,952 | 48,790 |
Updated shares - VJR |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating income | 1,655,813 |  |  |
Gain on sale of LLC |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating income | 1,164,294 |  |  |
Other revenues |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating income | R$ 27,749 | 18,018 | 61,274 |
Gain on sales of assets held for sale |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Other operating income |  | R$ 755,151 | R$ 252,023 |

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