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Off-balance sheet commitments (Details 1) - BRL (R$)
R$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Offbalance Sheet Commitments [Abstract]    
Commitments to extend credit [1] R$ 203,927,816 R$ 237,019,535
Financial guarantees [2] 78,867,348 78,949,483
Letters of credit for imports 294,229 329,015
Total R$ 283,089,393 R$ 316,298,033
[1] Includes available lines of credit, limits for credit cards, personal loans, housing loans and overdrafts; and
[2] Refers to guarantees mostly provided for Corporate customers.