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Risk Management (Details 8) - BRL (R$)
R$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Loans And Advances Impaired By Category [Abstract]    
Credit card R$ 6,158,265 R$ 5,962,131
Working capital 6,052,758 5,940,498
Personal credit 4,632,789 4,951,949
Housing loans 4,071,447 2,553,802
Financing and export 2,770,221 2,456,658
Vehicles - CDC (Direct consumer credit) 1,333,748 1,651,852
Rural loans 982,699 946,282
Onlending BNDES/Finame 780,985 1,052,671
Overdraft for individuals 638,506 882,992
Acquisition of assets 295,944 459,574
Overdraft for corporate 256,271 406,296
Others 13,559,800 14,869,110
Total R$ 41,533,433 R$ 42,133,815