XML 210 R171.htm IDEA: XBRL DOCUMENT v3.8.0.1
Financial assets pledged as collateral (Details Text) - BRL (R$)
R$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Financial assets pledged as collateral (Details Text)    
Financial instruments pledged as collateral and classified as available for sale - Unrealized gains R$ 3,246,351 R$ 2,052,366
Financial instruments pledged as collateral and classified as available for sale - Unrealized losses 557,974 1,443,642
May be repledged    
Financial assets pledged as collateral (Details Text)    
Collateral is a conditional commitment to ensure that the contractual clauses of a repurchase agreements are complied 178,964,158 147,673,043
Sold or repledged    
Financial assets pledged as collateral (Details Text)    
Collateral is a conditional commitment to ensure that the contractual clauses of a repurchase agreements are complied R$ 5,011,015 R$ 7,613,534