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25. FINANCIAL INCOME (EXPENSES) (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial income | R$ 1,310,514 | R$ 295,074 | R$ 643,590
Financial expenses | (2,806,157) | (2,758,701) | (3,166,017)
Inflation adjustment and exchange differences, net | (533,919) |  | 116,948
Financial income (expense), net | (1,495,643) | (2,463,627) | (2,522,427)
Statement of gains and (losses) on derivative transactions | (1) | 28,274 | (812,227)
Dollar-to-euro swap |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Statement of gains and (losses) on derivative transactions | (1) | (229) | (6,467)
Future DI |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Statement of gains and (losses) on derivative transactions |  | 28,503 | 5,829
Future Dollar |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Statement of gains and (losses) on derivative transactions |  |  | (805,760)
Swap Pre x CDI |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Statement of gains and (losses) on derivative transactions |  |  | (299)
Swap CDI x Pre |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Statement of gains and (losses) on derivative transactions |  |  | (63)
Borrowings and financing - foreign currency |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial expenses | (988,821) | (827,841) | (930,508)
Borrowings and financing - local currency |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial expenses | (1,020,867) | (1,610,714) | (2,229,849)
Related parties |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial expenses | (16,092) |  | (3,185)
Capitalized interest |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial expenses | 71,611 | 91,957 | 215,794
Losses on derivatives |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial expenses |  |  | (362)
Interest, fines and late payment charges |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial expenses | (71,100) | (72,343) | (38,002)
Commission and bank fees |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial expenses | (182,179) | (159,088) | (155,249)
PIS/COFINS over financial income |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial expenses | (84,404) | (21,926) | (39,154)
Other financial expenses |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial expenses | 19,614 | (142,296) | (102,450)
Inflation adjustment and exchange differences, net |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial expenses |  | (16,450) |
Inflation adjustment and exchange differences, net | (1,035) |  | 7,865
Inflation adjustments, net |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial expenses |  | (10,556) |
Exchange differences, net |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial expenses |  | (5,665) |
Inflation adjustment and exchange differences, net | (532,883) |  | 921,310
Exchange gain (losses) on derivatives |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial expenses |  | (229) |
Inflation adjustment and exchange differences, net | (1) |  | (812,227)
Related parties |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial income | 64,888 | 61,549 | 60,964
Income from financial investments |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial income | 111,235 | 162,292 | 301,401
Gain from derivative |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial income |  | 28,503 | 5,829
Gain on repurchase of debt securities |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial income |  |  | 146,214
Other income |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Financial income | R$ 1,134,391 | R$ 42,730 | R$ 129,182

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