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Note 12 - Income Tax and Social Contribution - Income Taxes Reported (Details) - BRL (R$)
R$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Statement Line Items [Line Items]      
Income tax expense - current R$ (1,833.5) R$ (5,332.3) R$ (413.9)
Deferred tax expense on temporary differences (246.1) 891.9 (732.5)
Deferred tax over taxes losses carryforwards movements in the current period 290.0 (638.9) 831.4
Total deferred tax (expense)/income 43.9 253.0 98.9
Total income tax expenses R$ (1,789.6) R$ (5,079.3) R$ (315.0)