XML 160 R144.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 27 - Financial Instruments and Risks (Details Textual) - BRL (R$)
R$ in Millions
1 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement Line Items [Line Items]        
Value at risk exposure, probable   95.00%    
Value at risk, duration   21 days    
Value at risk, adverse scenario, deterioration percentage   25.00%    
Value at risk, remote scenario, deterioration percentage   50.00%    
Total gains (losses) on financial assets at fair value through profit or loss   R$ 227.6 R$ 247.5 R$ 261.4
Guarantees held for derivative instruments R$ 608.3 608.3 R$ 486.8  
Swap contract [member]        
Statement Line Items [Line Items]        
Total gains (losses) on financial assets at fair value through profit or loss 67.0      
Equity price risk [member]        
Statement Line Items [Line Items]        
Risk exposure associated with instruments sharing characteristic R$ 2,300.0 R$ 2,300.0    
Bottom of range [member]        
Statement Line Items [Line Items]        
Trigger clause percentage, credit risk   10.00%    
Top of range [member]        
Statement Line Items [Line Items]        
Trigger clause percentage, credit risk   15.00%