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30. Financial Income (Expenses) (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial expenses | R$ (807,967) | R$ (688,280) | R$ (839,891)
Financial income | 446,302 | 326,244 | 448,710
Financial income (expenses), net before exchange rate changes | (361,665) | (362,036) | (391,181)
Exchange rate changes, net | (902,671) | (96,018) | 1,090,628
Financial income (expenses), net | (1,264,336) | (458,054) | 699,447
Interest and charges on borrowings and financing - local currency |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial expenses | (332,149) | (289,780) | (317,379)
Interest and charges on borrowings and financing - foreign currency |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial expenses | (171,686) | (119,100) | (113,268)
Other financial expenses |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial expenses | (187,563) | (97,533) | (86,372)
Income tax over international remittance |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial expenses | (19,779) | (17,901) | (18,823)
Inflation adjustment on borrowings and financing |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial expenses | (66,183) | (62,787) | (121,036)
Inflation adjustment on Sabesprev Mais deficit |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial expenses | 0 | 0 | (891)
Other inflation adjustments |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial expenses | (45,193) | (50,941) | (48,634)
Interest and inflation adjustments on provisions |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial expenses | 14,586 | (50,238) | (133,488)
Inflation adjustment gains |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial income | 105,952 | 89,010 | 152,154
Income on short-term investments |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial income | 187,094 | 195,992 | 209,376
Interest income |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial income | 175,939 | 57,166 | 99,068
Cofins and Pasep |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial income | (22,693) | (16,366) | (23,535)
Other |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Financial income | 10 | 442 | 11,647
Exchange rate changes on borrowings and financing |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Exchange rate changes, net | (915,897) | (96,300) | 1,090,466
Exchange rate changes on assets |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Exchange rate changes, net | 13,235 | 336 | 371
Other exchange rate changes |  |  |
SummaryOfFinancialIncomeExpenseLineItems [Line Items] |  |  |
Exchange rate changes, net | R$ (9) | R$ (54) | R$ (209)

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