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New standards and amendments and interpretations of existing standards (Details 2)
R$ in Millions
Dec. 31, 2018
BRL (R$)
Current best estimates  
Estimated Exposure to Credit Risk R$ 521,546
Expected Loss R$ 33,048
Expected Loss on Estimated Exposure to Credit Risk 6.00%
Stage 1  
Current best estimates  
Estimated Exposure to Credit Risk R$ 432,416
Expected Loss R$ 7,688
Expected Loss on Estimated Exposure to Credit Risk 2.00%
Stage 2  
Current best estimates  
Estimated Exposure to Credit Risk R$ 51,853
Expected Loss R$ 7,581
Expected Loss on Estimated Exposure to Credit Risk 15.00%
Stage 3  
Current best estimates  
Estimated Exposure to Credit Risk R$ 37,277
Expected Loss R$ 17,779
Expected Loss on Estimated Exposure to Credit Risk 48.00%