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12. BORROWINGS, FINANCING AND DEBENTURES (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure of detailed information about borrowings [line items] |  |
Borrowings and financing, current | R$ 5,681,797 | R$ 6,551,764
Borrowings and financing, noncurrent | 23,260,944 | 23,017,953
Transaction costs and issue premiums, current | (28,358) | (24,862)
Transaction costs and issue premiums, noncurrent | (87,309) | (34,011)
Borrowings and financing and transaction costs, current | 5,653,439 | 6,526,902
Borrowings and financing and transaction costs, noncurrent | 23,173,635 | 22,983,942
Foreign Currency |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings and financing, current | 3,687,971 | 1,566,302
Borrowings and financing, noncurrent | 12,550,266 | 13,214,982
Foreign Currency | Prepayment |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings and financing, current | 1,016,737 | 791,163
Borrowings and financing, noncurrent | 3,830,240 | 4,097,509
Foreign Currency | Perpetual bonds |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings and financing, current | 2,490,178 |
Borrowings and financing, noncurrent | 8,613,491 |
Foreign Currency | Others |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings and financing, current | 181,056 | 251,630
Borrowings and financing, noncurrent | 106,535 | 197,131
Foreign Currency | Advance contract exchange (ACC) |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings and financing, current |  | 523,509
Borrowings and financing, noncurrent |  | 8,920,342
Local Currency |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings and financing, current | 1,993,826 | 4,985,462
Borrowings and financing, noncurrent | 10,710,678 | 9,802,972
Local Currency | Prepayment |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings and financing, current | 103,376 | 3,303
Borrowings and financing, noncurrent |  | 100,000
Local Currency | BNDES/FINAME |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings and financing, current | 1,890,450 | 4,982,159
Borrowings and financing, noncurrent | R$ 10,710,678 | R$ 9,702,972

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