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Note 12 - Income Tax and Social Contribution (Tables) | 12 Months Ended
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Dec. 31, 2017
Statement Line Items [Line Items] |
Disclosure of income tax [text block] |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Income tax expense - current |  |  | (5,332.3 | ) |  |  | (413.9 | ) |  |  | (1,227.8 | )
Deferred tax expense on temporary differences |  |  | 891.9 |  |  |  | (732.5 | ) |  |  | (2,192.4 | )
Deferred tax over taxes losses carryforwards movements in the current period |  |  | (638.9 | ) |  |  | 831.4 |  |  |  | (214.0 | )
Total deferred tax (expense)/income |  |  | 253.0 |  |  |  | 98.9 |  |  |  | (2,406.4 | )
Total income tax expenses |  |  | (5,079.3 | ) |  |  | (315.0 | ) |  |  | (3,634.2 | )
Disclosure of reconciliation from the weighted nominal to the effective tax rate [text block] |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Income before tax |  |  | 12,929.8 |  |  |  | 13,398.4 |  |  |  | 16,513.4 |
Adjustment on taxable basis |  |  |  |  |  |  |  |  |  |  |  |
Non-taxable income |  |  | (310.9 | ) |  |  | (392.0 | ) |  |  | (999.9 | )
Government grants related to sales taxes |  |  | (1,889.1 | ) |  |  | (1,528.6 | ) |  |  | (1,360.7 | )
Share of results of joint ventures |  |  | 3.1 |  |  |  | 5.0 |  |  |  | (3.1 | )
Non-deductible expenses |  |  | 91.1 |  |  |  | 539.3 |  |  |  | 415.9 |
Complement of income tax of foreign subsidiaries due in Brazil |  |  | 560.4 |  |  |  | 148.0 |  |  |  | 1,965.2 |
Results of intercompany transactions non-taxable/not deductible in Brazil |  |  | (547.5 | ) |  |  | 640.7 |  |  |  | (1,313.2 | )
|  |  | 10,836.9 |  |  |  | 12,810.8 |  |  |  | 15,217.6 |
Aggregated weighted nominal tax rate |  |  | 29.22 | % |  |  | 30.16 | % |  |  | 31.59 | %
Taxes payable – nominal rate |  |  | (3,166.6 | ) |  |  | (3,864.0 | ) |  |  | (4,806.9 | )
Adjustment on tax expense |  |  |  |  |  |  |  |  |  |  |  |
Regional incentives - income taxes |  |  | 304.6 |  |  |  | 264.5 |  |  |  | 257.8 |
Deductible interest on shareholders' equity |  |  | 1,649.0 |  |  |  | 1,867.7 |  |  |  | 1,646.1 |
Tax savings from goodwill amortization on tax books |  |  | 175.2 |  |  |  | 142.0 |  |  |  | 142.4 |
Withholding tax over undistributed profits |  |  | (356.9 | ) |  |  | 153.1 |  |  |  | (672.4 | )
Recognition / write-off of deferred charges on tax losses |  |  | (178.9 | ) |  |  | 796.7 |  |  |  | 138.1 |
PERT 2017 |  |  | (2,784.7 | ) |  |  | - |  |  |  | - |
Others with reduced taxation |  |  | (721.0 | ) |  |  | 325.0 |  |  |  | (339.3 | )
Income tax and social contribution expense |  |  | (5,079.3 | ) |  |  | (315.0 | ) |  |  | (3,634.2 | )
Effective tax rate |  |  | 39.28 | % |  |  | 2.35 | % |  |  | 22.01 | %

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