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17. Borrowings and financing (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | R$ 2,103,612 | R$ 1,746,755 |
Noncurrent | 11,049,184 | 10,354,211 |
Total | 13,152,796 | 12,100,966 | R$ 11,964,143
Local currency |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 1,365,112 | 1,199,384 |
Noncurrent | 5,118,275 | 5,228,761 |
Total | 6,483,387 | 6,428,145 | 6,303,780
Local currency | 10th issue debentures |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 42,493 | 41,702 |
Noncurrent | 40,194 | 80,953 |
Total | 82,687 | 122,655 |
Local currency | 12th issue debentures |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 45,450 | 45,450 |
Noncurrent | 249,249 | 294,702 |
Total | 294,699 | 340,152 |
Local currency | 14th issue debentures |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 41,270 | 40,503 |
Noncurrent | 103,005 | 141,351 |
Total | 144,275 | 181,854 |
Local currency | 15th issue debentures |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 359,394 | 346,414 |
Noncurrent | 0 | 345,788 |
Total | 359,394 | 692,202 |
Local currency | 17th issue debentures |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 279,100 | 144,391 |
Noncurrent | 532,691 | 781,922 |
Total | 811,791 | 926,313 |
Local currency | 18th issue debentures |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 33,469 | 33,020 |
Noncurrent | 165,267 | 194,872 |
Total | 198,736 | 227,892 |
Local currency | 20th issue debentures |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 248,334 | 250,000 |
Noncurrent | 0 | 246,890 |
Total | 248,334 | 496,890 |
Local currency | 21th issue debentures |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 0 | 0 |
Noncurrent | 499,604 | 499,628 |
Total | 499,604 | 499,628 |
Local currency | 22th issue debentures |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 0 | 0 |
Noncurrent | 756,040 | 0 |
Total | 756,040 | 0 |
Local currency | Brazilian Federal Savings Bank |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 75,223 | 78,487 |
Noncurrent | 1,266,592 | 1,154,599 |
Total | 1,345,684 | 1,236,674 | 1,150,691
Local currency | Brazilian Development Bank - BNDES BAIXADA SANTISTA |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 16,899 | 16,782 |
Noncurrent | 0 | 16,782 |
Total | 16,899 | 33,564 |
Local currency | Brazilian Development Bank - BNDES PAC |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 11,227 | 11,143 |
Noncurrent | 39,169 | 50,028 |
Total | 50,396 | 61,171 |
Local currency | Brazilian Development Bank - BNDES PAC II 9751 |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 4,364 | 4,334 |
Noncurrent | 18,811 | 22,991 |
Total | 23,175 | 27,325 |
Local currency | Brazilian Development Bank - BNDES PAC II 9752 |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 3,186 | 2,367 |
Noncurrent | 23,100 | 19,526 |
Total | 26,286 | 21,893 |
Local currency | Brazilian Development Bank - BNDES ONDA LIMPA |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 23,632 | 23,469 |
Noncurrent | 123,875 | 146,461 |
Total | 147,507 | 169,930 |
Local currency | Brazilian Development Bank - BNDES TIETÊ III |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 30,589 | 30,378 |
Noncurrent | 252,197 | 280,825 |
Total | 282,786 | 311,203 |
Local currency | Brazilian Development Bank - BNDES 2015 |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 31,615 | 10,050 |
Noncurrent | 490,729 | 397,922 |
Total | 522,344 | 407,972 |
Local currency | Leases |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 19,077 | 17,573 |
Noncurrent | 549,589 | 544,044 |
Total | 568,666 | 561,617 |
Local currency | Other |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 1,380 | 1,466 |
Noncurrent | 8,163 | 9,477 |
Total | 9,543 | 10,943 |
Local currency | Interest and charges |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 98,410 | 101,855 |
Noncurrent | 0 | 0 |
Total | 98,410 | 101,855 |
Foreign currency |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 738,500 | 547,371 |
Noncurrent | 5,930,909 | 5,125,450 |
Total | 6,669,409 | 5,672,821 | 5,660,363
Foreign currency | Interest and charges |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 52,710 | 37,462 |
Noncurrent | 0 | 0 |
Total | 52,710 | 37,462 |
Foreign currency | Inter-American Development Bank - BID 1212 |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 39,826 | 34,000 |
Noncurrent | 238,954 | 238,000 |
Total | 278,780 | 272,000 |
Foreign currency | Inter-American Development Bank - BID 2202 |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 124,098 | 81,757 |
Noncurrent | 1,969,565 | 1,375,358 |
Total | 2,093,663 | 1,457,115 |
Foreign currency | International Bank of Reconstruction and Development -BIRD |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 11,779 | 0 |
Noncurrent | 341,646 | 301,665 |
Total | 353,425 | 301,665 |
Foreign currency | Deutsche Bank |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 288,479 | 248,100 |
Noncurrent | 0 | 242,343 |
Total | 292,872 | 496,726 | 485,090
Foreign currency | Eurobonds |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 0 | 0 |
Noncurrent | 1,354,532 | 1,155,331 |
Total | 1,358,412 | 1,158,642 | 1,141,649
Foreign currency | JICA 15 |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 40,646 | 33,881 |
Noncurrent | 406,462 | 372,696 |
Total | 447,108 | 406,577 |
Foreign currency | JICA 18 |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 36,545 | 30,463 |
Noncurrent | 365,230 | 334,849 |
Total | 401,775 | 365,312 |
Foreign currency | JICA 17 |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 11,835 | 2,507 |
Noncurrent | 51,786 | 41,835 |
Total | 63,621 | 44,342 |
Foreign currency | JICA 19 |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 64,028 | 0 |
Noncurrent | 1,047,081 | 873,383 |
Total | 1,111,109 | 873,383 |
Foreign currency | BID 1983AB |  |  |
SummaryOfBorrowingsAndFinancingLineItems [Line Items] |  |  |
Current | 68,554 | 79,201 |
Noncurrent | 155,653 | 189,990 |
Total | R$ 225,592 | R$ 270,470 | R$ 343,588

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